Problem/Motivation
I'm trying to prepare some of my modules for Drupal 9.
But one of my modules - Bamboo Twig - does not provide me the possibility to run tests against the Drupal 9 Branch.

Here is the issue to prepare Bamboo Twig for Drupal 9: https://www.drupal.org/project/bamboo_twig/issues/3090749
Also, before reaching help, I try to install Bamboo Twig in a fresh Drupal 9 installation and it works fine.
Proposed resolution
I'm pretty sure I've done something wrong, maybe with the composer.json of Bamboo Twig ?
Am I requiring something which is not compatible with Drupal 9 ?
I'm looking for help, how can I debug this kind of issue ?
Many thanks for your help
Comments
Comment #2
avpadernoIt seems the issue isn't reproducible anymore. I tried re-testing a patch in #3110310: Blocks rendered via bamboo_render_block do not use the block theme hook and I could select Drupal 9.0.x (or Drupal 9.1.x) for all the three branches. I could even select a version instead of a development snapshot.
Comment #4
drummThis would have been a configuration that Mixologic updated at some point.