@lmlima

This is working for me.

Drupal 10.2.2 / BEF 6.0.6 / Select2 8.x-1.15

lmlima → created an issue.

Just fixing filename from #24.

Patch in #23 did not work for me on D10.

In admin/config/development/maintenance, I got:
TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in implode() (line 102 of modules/contrib/readonlymode/readonlymode.module).

I could get a no error or warning install using

1. Using https://www.drupal.org/files/issues/2023-04-17/argument-passed-as-string... → fixed TypeError: Argument 2 passed to _readonlymode_form_list_check() must be of the type string, array given. Credit to OPTASY 🐛 Argument 2 passed to _readonlymode_form_list_check() must be of the type array, string given Active
2. Using https://git.drupalcode.org/project/readonlymode/-/commit/2ef5cf6e49dbcca... fixed Warning: Undefined array key "show_view_elements". Credit to Ben Teegarden
3. There was also a "Warning: Undefined array key "actions"" in some administrative pages that I fixed appending the 'actions' key just like in item 2.

lmlima → changed the visibility of the branch 8.x-1.x to hidden.

lmlima → changed the visibility of the branch 3424355-exclude-some-css to active.

lmlima → changed the visibility of the branch 3424355-exclude-some-css to hidden.

lmlima → created an issue.