Fixes #1098.

Description

Fixed a bug where a faulty (e.g.: custom) transform used in a Queue would throw an error that would be caught by a try / except statement but ignored, causing an UnboundLocalError. This error did not give any information on the original exception, making it harder to understand that the origin of the problem is a faulty transform.

This PR makes the Queue raises the original exception

Checklist

• [ x] I have read the CONTRIBUTING docs and have a developer setup (especially important are pre-commitand pytest)
• [x ] Non-breaking change (would not break existing functionality)
• Breaking change (would cause existing functionality to change)
• Tests added or modified to cover the changes
• [ x] Integration tests passed locally by running pytest
• In-line docstrings updated
• Documentation updated, tested running make html inside the docs/ folder
• [ x] This pull request is ready to be reviewed