Thank you all for the answers and the advice! As Raphael told me here
https://bugzilla.redhat.com/show_bug.cgi?id=1202425 "LXQt spin is rarely maintained
by a small group of people not more than an handful in count. Please keep being
patient"
I understand now that I have to wait and be patient. I think I will switch to 36 Beta, get
LXQt 1.0 to ask further questions.
WMA error and "Regexp mismatch" errors aren't related to LXQt, but are
related to Fedora-LXQt ISO that I installed. I will try to fix them by myself.