Content item submission form - Unknown column

Strange i couldn reproduce the problème on fresh installation

I wasn't able to either.

Since I'm wokring on an older site, I'm wondering if there was something specific set that is causing the problem.

Yes
Maybe tou Can update language file by install new one

hello that the solution
when you upgrade j3 -> j4 language files aren't update (joomla part) that creat this error
just go to language part, search french language and clic to re install ..
that the solution

Hi there,

I get the same error:
"Unknown column 'Array' in 'where clause'"
on a live site, on a frontend submission form page, and nothing else on that page.

Setup is:
- Joomla! 3.10.11
- FLEXIcontent 4.1.3
- php 7.4.30
- sql 5.7.39

Installed languages are:
- English
- German (default)

Content Languages are
- English (no German here (anymore?) Is that weird? Don't remember if German was once there.)

[/administrator/index.php?option=com_installer&view=languages]
says: "The update table is not up to date. Please rebuild your update server table"

but
[/administrator/index.php?option=com_installer&view=updatesites]
seems to do nothing exept "Update sites have been rebuilt from manifest files." after click on button "rebuild". Also, above message, and the error does not go away.

[/administrator/index.php?option=com_installer&view=database]
says, "Database table structure is up to date."

--

What can I do to re-enable my client's frontend submission form?
Thanks a lot!

Hello
Try to update to last dev version via github
Try to update your language file