[Koha] Adding items to a list not possible in Koha 21.11.09

[Andreas Roussos]

Hi Michael,

I've tried to reproduce the issue you describe on a development
21.11.09 instance that I set up, but was not successful.

So, I have a few questions for you to help me diagnose this ;-)

Assuming a package installation, have you restarted the koha-common
service following the upgrade?
Have you performed a hard refresh of your web browser's cache? (hit
CTRL-F5)
Finally, which version of Koha did you upgrade from?

Kind regards,
Andreas