Flexicontent pour Joomla 6

Hello,
I am currently migrating a website to Joomla 6 containing over 1,500 articles created using Flexicontent
Everything is working fine, but when I click Save/Close, I get the following error: 0 Call to undefined method Joomla\Database\Mysqli\MysqliQuery::castAsChar()
And the article remains locked
If I click ‘Apply’, it saves but freezes at the end without closing the little pop-up.
I saw an announcement about the release of the beta version saying that it worked fine – are you experiencing the same errors?
If not, do you have any idea what might be causing this? An incompatible Flexi plugin? A corrupted database table?
Thank's

hello if you use 4.2.1 stable that normal you need to update flexicontent with beta version
github.com/FLEXIcontent/flexicontent-cck...efs/heads/master.zip
working very well but need some return before release
just a note we do a lot of works on template with rewritting with flex and grid capacity. Mayve that can create some disturb on module display or other view. In many case just edit check new params and save