Lyx can't found document class

Yesterday I install Lyx on Tumbleweed. I has been used this application previously at Leap, but here on tumbleweed when I want change the document type I get an error about that I need install a document class (for example article.cls). These files are installed on my system, but Lyx just can’t found them, I reconfigure Lyx but the problem is still there. And I don’t have idea about how tell to Lyx where are these file. Any idea? Thanks.

It should be in


for LyX to find it.

The files are there. If I select “Tools → TeX information” all these files are listed. But in “Document → Configuration…” it say “Not available”. It seems Lyx is broken :frowning:

Check and put in a report if no-one has reported it.