language extensions in 7.0 not working?

ver: 7.0.2.2
fedora 31

installed both standard swiss german dict (from extensions web page, which did not change since 2017) and my own dict as extensions (same as i did under previous versions). this has been always working, also the popup under Tools>Spelling… always showed at least something (like many english languages and german-swiss) in the “text languages” dropdown. in 7.0.2.2 the dropdown is always empty and it does now spellcheck my previous documents (which i did not touch since installing 7.0.2.2).
what am i doing wrong?