Moderator: I just upgraded your “Trust Level” on the forum so you can post screen shots and .txt files ect.
The information you provide is rather skimpy. To help us help you could you be more specific and tell us or post a screen shot of what you are trying to do? Please remember to post code as code with the </> icon.
Just facts: There are packages lib64xslt-devel and lib64xslt1 in main/release repository. But with the lack of detailed information it is impossible to know for sure what is needed for your situation.