Using the latest version Joomla 4.0.4. RL Library is 21.11.13345. The latest update for Cacheclaener module 8.0.1 causes problems by changing in articles, components etc.
Gives error message: 1048 Column 'checked_out_time' cannot be null. Checked the databases: no problem there.
After long searching, i learned it is the latest update cacheclaener 8.0.1. Version 8.0.0. works ok. I replaced this former version.
The development update Cachecleaner 8.0.2 installed. Looks good. Till now no "old" problems seen.
Thanks for the prompt reaction.
The cachecleaneris a fantastic tool.
I also use Modals. look forward for the joomla 4 update.
Thanks