I already did earlier today and it helped. Thanks for your help.
On this site we are not using Meta Box AIO, this client only uses Meta Box Lite. I got installed Meta Box Version 5.10.19 and Meta Box Lite Version 2.3.3. We need to fix this se we can keep developing the site. What should I do?
Any news on this? Where can I at least download Metabox Lite older versions? I cannot find it anywhere.