SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)

Hello all.
We are experiencing the issue with the Gitlab integration with Jira, after the Jira upgrade to the newer version and new OS
Beforehead, Jira was of version 7, installed on CentOS6 and worked with no SSL
Today Jira is on the CentOS7, Version 8.13.9, and works via SSL
Gitlab is version 13.5.3 - self-managed

Gitlab integration to Jira fails every time with the error “SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)”
What has been done so far:

  1. Jira SSL configuration has been tested with Atlassian support and they investigated it to confirm that the SSL config is done flawlessly
  2. Gitlab certificates bundle has been updated via yum
  3. Jira public certificate has been added to the trusted certs inside the gitlab and I ran the reconfigure
  4. CURL from GItlab server to Jira is throwing the error 77 - curl: (77) Problem with the SSL CA cert (path? access rights?)
  5. We have been through these guides and did every step in them with no luck:
    Troubleshooting SSL | GitLab
    Jira integrations | GitLab
    https://confluence.atlassian.com/jiracore/integrating-jira-with-gitlab-1019398724.html

Also read here these three topics:

And unfortunately no luck
Can someone please assist?
Thanks in advance