Export failing for 2 projects, export button does nothing

Hello,
I’m trying to export 2 projects but i’m not able to - after hitting export, nothing happens. Sidekiq logs provide the following - it seems to me the exporter job starts, and the sidekiq just restarts? Memory / CPU and disk space is fine during this time too. Running on version 11.9.7

2020-06-22_20:08:39.95906 2020-06-22T20:08:39.958Z 26109 TID-os98y552d ProjectExportWorker JID-1db4f382d19f3147dcfa14ce INFO: start
2020-06-22_20:15:37.60999 2020-06-22T20:15:37.608Z 17759 TID-owd7owu0n INFO: Booting Sidekiq 5.2.5 with redis options {:path=>"/var/opt/gitlab/redis/redis.socket", :namespace=>"resque:gitlab", :id=>"Sidekiq-server-PID-17759", :url=>nil}
2020-06-22_20:15:37.75290 2020-06-22T20:15:37.752Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: stuck_ci_jobs_worker
2020-06-22_20:15:37.75514 2020-06-22T20:15:37.755Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: expire_build_artifacts_worker
2020-06-22_20:15:37.75693 2020-06-22T20:15:37.756Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: pipeline_schedule_worker
2020-06-22_20:15:37.75985 2020-06-22T20:15:37.759Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: repository_check_worker
2020-06-22_20:15:37.76282 2020-06-22T20:15:37.762Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: admin_email_worker
2020-06-22_20:15:37.76439 2020-06-22T20:15:37.764Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: repository_archive_cache_worker
2020-06-22_20:15:37.76592 2020-06-22T20:15:37.765Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: ci_archive_traces_cron_worker
2020-06-22_20:15:37.76744 2020-06-22T20:15:37.767Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: pages_domain_verification_cron_worker
2020-06-22_20:15:37.77073 2020-06-22T20:15:37.770Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: import_export_project_cleanup_worker
2020-06-22_20:15:37.77369 2020-06-22T20:15:37.773Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: requests_profiles_worker
2020-06-22_20:15:37.77530 2020-06-22T20:15:37.775Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: remove_expired_members_worker
2020-06-22_20:15:37.77691 2020-06-22T20:15:37.776Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: remove_expired_group_links_worker
2020-06-22_20:15:37.77870 2020-06-22T20:15:37.778Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: prune_old_events_worker
2020-06-22_20:15:37.78055 2020-06-22T20:15:37.780Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: trending_projects_worker
2020-06-22_20:15:37.78214 2020-06-22T20:15:37.782Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: remove_unreferenced_lfs_objects_worker
2020-06-22_20:15:37.78367 2020-06-22T20:15:37.783Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: stuck_import_jobs_worker
2020-06-22_20:15:37.79201 2020-06-22T20:15:37.791Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: gitlab_usage_ping_worker
2020-06-22_20:15:37.79625 2020-06-22T20:15:37.796Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: stuck_merge_jobs_worker
2020-06-22_20:15:37.79797 2020-06-22T20:15:37.797Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: issue_due_scheduler_worker
2020-06-22_20:15:37.80027 2020-06-22T20:15:37.800Z 17759 TID-owd7owu0n INFO: Cron Jobs - add job with name: prune_web_hook_logs_worker
2020-06-22_20:15:48.28086 2020-06-22T20:15:48.280Z 17759 TID-owd7owu0n INFO: Running in ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-linux]
2020-06-22_20:15:48.28094 2020-06-22T20:15:48.280Z 17759 TID-owd7owu0n INFO: See LICENSE and the LGPL-3.0 for licensing details.
2020-06-22_20:15:48.28100 2020-06-22T20:15:48.280Z 17759 TID-owd7owu0n INFO: Upgrade to Sidekiq Pro for more features and support: http://sidekiq.org
2020-06-22_20:15:48.28164 2020-06-22T20:15:48.281Z 17759 TID-owd7owu0n WARN: Sidekiq 6.0 will require Redis 4.0+, you are using Redis v3.2.12
2020-06-22_20:15:48.28345 2020-06-22T20:15:48.283Z 17759 TID-owd7owu0n INFO: Starting processing, hit Ctrl-C to stop
2020-06-22_20:15:48.28894 2020-06-22T20:15:48.288Z 17759 TID-owd7owu0n INFO: Listening on queues ["authorized_projects", "auto_devops", "auto_devops:auto_devops_disable", "background_migration", "chat_notification", "container_repository", "container_repository:cleanup_container_repository", "container_repository:delete_container_repository", "create_gpg_signature", "create_note_diff_file", "cronjob", "cronjob:admin_email", "cronjob:ci_archive_traces_cron", "cronjob:expire_build_artifacts", "cronjob:gitlab_usage_ping", "cronjob:import_export_project_cleanup", "cronjob:issue_due_scheduler", "cronjob:pages_domain_verification_cron", "cronjob:pipeline_schedule", "cronjob:prune_old_events", "cronjob:prune_web_hook_logs", "cronjob:remove_expired_group_links", "cronjob:remove_expired_members", "cronjob:remove_unreferenced_lfs_objects", "cronjob:repository_archive_cache", "cronjob:repository_check_dispatch", "cronjob:requests_profiles", "cronjob:stuck_ci_jobs", "cronjob:stuck_import_jobs", "cronjob:stuck_merge_jobs", "cronjob:trending_projects", "default", "delete_diff_files", "delete_merged_branches", "delete_stored_files", "delete_user", "deployment", "deployment:deployments_success", "detect_repository_languages", "email_receiver", "emails_on_push", "expire_build_instance_artifacts", "gcp_cluster", "gcp_cluster:cluster_configure", "gcp_cluster:cluster_install_app", "gcp_cluster:cluster_patch_app", "gcp_cluster:cluster_project_configure", "gcp_cluster:cluster_provision", "gcp_cluster:cluster_upgrade_app", "gcp_cluster:cluster_wait_for_app_installation", "gcp_cluster:cluster_wait_for_ingress_ip_address", "gcp_cluster:wait_for_cluster_creation", "git_garbage_collect", "github_import_advance_stage", "github_importer", "github_importer:github_import_import_diff_note", "github_importer:github_import_import_issue", "github_importer:github_import_import_lfs_object", "github_importer:github_import_import_note", "github_importer:github_import_import_pull_request", "github_importer:github_import_refresh_import_jid", "github_importer:github_import_stage_finish_import", "github_importer:github_import_stage_import_base_data", "github_importer:github_import_stage_import_issues_and_diff_notes", "github_importer:github_import_stage_import_lfs_objects", "github_importer:github_import_stage_import_notes", "github_importer:github_import_stage_import_pull_requests", "github_importer:github_import_stage_import_repository", "gitlab_shell", "group_destroy", "hashed_storage", "hashed_storage:hashed_storage_migrator", "hashed_storage:hashed_storage_project_migrate", "hashed_storage:hashed_storage_project_rollback", "hashed_storage:hashed_storage_rollbacker", "import_issues_csv", "invalid_gpg_signature_update", "irker", "mail_scheduler", "mail_scheduler:mail_scheduler_issue_due", "mail_scheduler:mail_scheduler_notification_service", "mailers", "merge", "namespaceless_project_destroy", "new_issue", "new_merge_request", "new_note", "object_pool", "object_pool:object_pool_create", "object_pool:object_pool_destroy", "object_pool:object_pool_join", "object_pool:object_pool_schedule_join", "object_storage", "object_storage:object_storage_background_move", "object_storage:object_storage_migrate_uploads", "object_storage_upload", "pages", "pages_domain_verification", "pipeline_background", "pipeline_background:archive_trace", "pipeline_background:ci_build_trace_chunk_flush", "pipeline_cache", "pipeline_cache:expire_job_cache", "pipeline_cache:expire_pipeline_cache", "pipeline_creation", "pipeline_creation:create_pipeline", "pipeline_creation:run_pipeline_schedule", "pipeline_default", "pipeline_default:build_coverage", "pipeline_default:build_trace_sections", "pipeline_default:pipeline_metrics", "pipeline_default:pipeline_notification", "pipeline_hooks", "pipeline_hooks:build_hooks", "pipeline_hooks:pipeline_hooks", "pipeline_processing", "pipeline_processing:build_finished", "pipeline_processing:build_queue", "pipeline_processing:build_success", "pipeline_processing:ci_build_schedule", "pipeline_processing:pipeline_process", "pipeline_processing:pipeline_success", "pipeline_processing:pipeline_update", "pipeline_processing:stage_update", "pipeline_processing:update_head_pipeline_for_merge_request", "plugin", "post_receive", "process_commit", "project_cache", "project_daily_statistics", "project_destroy", "project_export", "project_migrate_hashed_storage", "project_rollback_hashed_storage", "project_service", "propagate_service_template", "reactive_caching", "rebase", "remote_mirror_notification", "repository_check", "repository_check:repository_check_batch", "repository_check:repository_check_clear", "repository_check:repository_check_single_repository", "repository_cleanup", "repository_fork", "repository_import", "repository_remove_remote", "repository_update_remote_mirror", "system_hook_push", "todos_destroyer", "todos_destroyer:todos_destroyer_confidential_issue", "todos_destroyer:todos_destroyer_entity_leave", "todos_destroyer:todos_destroyer_group_private", "todos_destroyer:todos_destroyer_private_features", "todos_destroyer:todos_destroyer_project_private", "update_merge_requests", "upload_checksum", "web_hook"]
2020-06-22_20:15:58.96754 2020-06-22T20:15:58.967Z 17759 TID-owd31yfxf PagesDomainVerificationCronWorker JID-b01ca352f6e6ffa71899c1e4 INFO: start
2020-06-22_20:15:58.97533 2020-06-22T20:15:58.975Z 17759 TID-owd31yh1r StuckImportJobsWorker JID-63046ed86eb229cd2583ab93 INFO: start
2020-06-22_20:15:59.12968 2020-06-22T20:15:59.129Z 17759 TID-owd31yh1r StuckImportJobsWorker JID-63046ed86eb229cd2583ab93 INFO: done: 0.154 sec
2020-06-22_20:15:59.14132 2020-06-22T20:15:59.140Z 17759 TID-owd31yfxf PagesDomainVerificationCronWorker JID-b01ca352f6e6ffa71899c1e4 INFO: done: 0.173 sec
2020-06-22_20:17:07.46365 2020-06-22T20:17:07.463Z 17759 TID-owd31yfxf Ci::ArchiveTracesCronWorker JID-9cdaacbde3aca3498793fd85 INFO: start
2020-06-22_20:17:07.81087 2020-06-22T20:17:07.810Z 17759 TID-owd31yfxf Ci::ArchiveTracesCronWorker JID-9cdaacbde3aca3498793fd85 INFO: done: 0.347 sec
2020-06-22_20:19:17.56764 2020-06-22T20:19:17.567Z 17759 TID-owd31yju3 PipelineScheduleWorker JID-e10eb75eba2352a22c6df11f INFO: start
2020-06-22_20:19:17.63332 2020-06-22T20:19:17.633Z 17759 TID-owd31yju3 PipelineScheduleWorker JID-e10eb75eba2352a22c6df11f INFO: done: 0.066 sec
2020-06-22_20:20:26.39783 2020-06-22T20:20:26.397Z 17759 TID-owd31yhl3 RepositoryCheck::DispatchWorker JID-9e9018eeba7ae07147ca8331 INFO: start
2020-06-22_20:20:26.40954 2020-06-22T20:20:26.409Z 17759 TID-owd31yjyj RepositoryCheck::BatchWorker JID-07be3fa986096278c09ca96b INFO: start
2020-06-22_20:20:26.42501 2020-06-22T20:20:26.424Z 17759 TID-owd31yhl3 RepositoryCheck::DispatchWorker JID-9e9018eeba7ae07147ca8331 INFO: done: 0.027 sec
2020-06-22_20:20:26.49811 2020-06-22T20:20:26.497Z 17759 TID-owd31yjyj RepositoryCheck::BatchWorker JID-07be3fa986096278c09ca96b INFO: done: 0.088 sec