Issues tab not working in Bitbucket Deployment

[Johannes Berthel]

I have a problem with Bitbucket Deployment. If I press the "promote" button it opens the "Deploy build..." modal but doesn't load the Jira tickets into the "Issues" Tab. Instead it shows this error message:

Otherwhise the "Jira Integration" seems to work (The deployments are shown inside the jira ticket). But I really liked that I could see the status of all tickets that I am going to deploy in one view.

I also reconnected Jira with Bitbucket many times, but no difference.

Do you know what I could try to make it work again?