Gitlab kinsta integration "Host key verification failed."

Gitlab kinsta integration “Host key verification failed.”

Hi, i’m working to build simple ci/cd pipeline,in which code will be pushed to the server if any code pushed to master, but due to some reason i’m getting error “Host key verification failed.” I have checked ssh keys and added gitlb in known_hosts and also checked file permission as well. but it shows this error everytime.

i followed How to Use Git at Kinsta (Cloning and Deploying Repo) this guide. it didn’'t seems like a issue from kinsta side. every possible help works.
Thanks