This patch worked for me .. Thanks!
It should be noted that since this causes an exception it stops further JS parsing - which when using aggregated JS means that many other JS libraries may not be loaded - so the effect may be far removed from tables.
re PHP 8.1 - no comment - I moved to PHP8 many months ago with no issues. Moving to D10 will take another few months as there are still modules we use that aren't quite ready.
FYI - this module is awesome and a critical part of one of our workflows for adding research publications with articles and authors - so we have 2 levels of inline forms... Thanks for all the hard work...
I noticed this PR: https://git.drupalcode.org/project/inline_entity_form/-/merge_requests/103
which implies that the 3.x branch once released wont support drupal 9. I think it is very important to let folks know that this is
an additional reason to downgrade to 1.x rather than up to 3.x. Obviously many many of us aren't at drupal 10 yet.
Thanks...