I'm trying to add the GitLab app via Developer Mode / app_descriptor.json upload, following these instructions: https://docs.gitlab.com/ee/integration/jira/connect-app.html#install-the-application-manually
This reproducibly leads me to this message: "An error occurred while provisioning the user for this app. Please try installing it again, and if then problem persists then contact Atlassian support."
However, this occurs only with one of my GitLab installations, while another one works perfectly fine. Both installations are publicly available, and on the exact same version. Comparing the two app_descriptor.json files from the two instances shows that they are 100% identical except for the URL.
The working instance has a simple URL like gitlab.domain.tld, whereas the non-working instance is hosted on GCP and has a more complex URL like omnibus-instance.hash.gcp.cloudsandbox.tld – that's the only difference I can make out.
Is it possible that this trips up Jira?
