@No1Son @Etherr That's interesting. Thank you for noticing this issue and reporting it! I've added it to our backlog and we'll make sure to fix this issue in our next release.
Here you can download Version 2.1.9 - this version is the last one working.
I personally do not really recommend to lower the version below 2.2.0 due to some migrations in the 2.2 version (the dataobject is different) and it might affect your button styling/colors. But if you don't mind that then it would be a simple temporarely solution 🙂