Hello, the same error happens when creating a new FAQ entry. Then saving it and re-opening it to add the other languages. When then entering the other...

Yes, the issue is present in "vanilla OST" as well. I was replying to your suggested fix, this no longer applies as 1.16.x already have the PHAR files...

Thanks for replying. We checked that and that reply does not seem to apply to 1.16.x releases any more, as in 1.16.x the PHAR files are already in ISO...

Issue remains with v1.16.2

Seems to be fixed with v1.16.2