[Kiralina]

Please @Kiralina you could check the "Trakt" (add-ons/quasar/tv shows/trakt/watchlist) option inside add-on "Quasar" is working properly?
In distro Openelec of Milhouse, using the instruction that he provided to you (delete URL Support), the plugin "Quasar" and "Trakt "go to work, but this distro Libreelec the same procedure solves the "Quasar", but not the "Trakt".
Thanks.

No, trakt is not working. Quasar works, but track integration doesn't. It has some http error right from the beginning, when you try to add your trakt user name and integrate it with Quasar. Nothing related to trakt works. Not even "most popular on trakt" and for these you normally don't need to register.

In the newer versions of LE you don't have to delete the URL from InputStream. Quasar works with InputStream "out of the box", but no trakt.