Fix the Bitbucket repository importing issue

What does this MR do and why?

It fixes the 500 error while importing a Bitbucket repository with a private issue tracker.

Screenshots or screen recordings

Current	Fix

How to set up and validate locally

1. Checkout the current branch
2. Create a Bitbucket project with a Private issue tracker
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3. Leave the project without issues
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4. Set up the Bitbucket omniauth provider and sign-in with your user
5. Start importing the newly created project
6. Validate that import works! 🎉

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #385567 (closed)