I don't know what went wrong. All I did to solve it was doing this:
I downloaded the qsvencc from rigaya and unpacked the file.
I opened the *.deb file via Double-Commander, and just copy the qsvencc out and put it into the /usr/local/bin folder, restarted FastFlix and all works again.
Sorry for this mess, being a human with autism is not easy.
I am running EndeavourOS, that is based on arch.
I don't know what went wrong. All I did to solve it was doing this:
Sorry for this mess, being a human with autism is not easy.