Warning: Undefined array key "#ief_submit_trigger" in layout_paragraphs_library_form_layout_paragraphs_component_form_alter()

I am having the same issue and it looks like it's because the ief_submit_trigger doesn't always exist. Just needs to add a isset check.

Thank you @dallen33 - I'm not aware of possible side-effects, so it would be super cool, if a layout_paragraphs maintainer could have a look. If there's no risk in this, the patch should be fine! :)

Perhaps !empty() might be an alternative.

I can also reproduce this warning when opening the media library from a paragraph edit modal.

This is now included & fixed in version 2.0.6. I'm pretty sure we can therefore close this issue.

@gidarai could you perhaps provide a link to the issue / commit where this was fixed, so this can be safely closed?
Did you try to reproduce it?

We are still receiving this error with 2.0.6 - and in looking at the code, has not been applied in the release. The patch no longer works though as the line positioning has changed from line 45 -> 48

As @gidarai mentioned, it appears that the fix in this patch was included in 2.0.6, MR 148 by @RuslanPiskarev, issue Add "Unlink from library" option when using Paragraph Library ✨ Add "Unlink from library" option when using Paragraph Library Fixed .

Yeah, the fix is now confirmed. Apparently, the failing patch was keeping the affected file from updating properly. When I removed the patch and reinstalled the module in Composer, it came through corrected.