Changing an existing Bitbucket Credentials causes an 404 - Not Found error.

HTTP ERROR 404
Problem accessing /credentials/store/system/domain/_/credential/<Credential ID>/. Reason:

    Not Found

Even though an error is shown, the save was successful and eg. the description has been updated.

Reproduction

1. Create a Bitbucket Access Token Credential
2. Navigate to it's edit page
3. Change a setting, eg. the description
4. Save
5. 404 Error is shown (credential is updated)

Workaround

Ignore the error.