RuntimeException: media_library.opener.form_element must be an instance of Drupal\media_library\MediaLibraryOpenerInterface

Thanks for the bug report and the proposed change! Assigning myself for review...

I've tested mr12 and works great. Thanks @johnlutz! +RTBC

Agreed. This looks good! Merging to the 2.x branch.

Re-opening, since as implied by the original description, this has backwards compatibility consequences: previous versions of media_library_form_element will not work with Drupal core 10.3 or above.

Given this, we should probably change the core_version_requirement to >=10.3 in the 2.x branch and cut a new release sooner rather than later, so that this doesn't prevent sites from updating to Drupal 10.3

I am a maintainer, but do not have permission to create new releases, so another of the maintainers will need to be involved.

Increasing the priority to "Major."

Clarification: based on testing, the change introduced here does not introduce BC problems with prior versions of Drupal core. Rather, this change is required for compatibility with Drupal 10.3 and above.

Therefore, I think we just need to cut a new release -- no change to the core_version_requirement.

Thanks @johnlutz and @mark_fullmer! I encountered this issue after upgrading to 10.3.0, and MR12 worked. A new release would be great to avoid needing a patch or using the dev version.

@nightlife2008, can you help with releasing version 2.1.0?