from those images theyre both using https. sonarr is always going to use http to talk to jacket.
it looks like you might be using the combined feed, not the individual indexer feeds? divxtotal instead of mejortorrent in the jacket url. that or you pasted in the wrong indexer?
as far as im aware there are issues using the combined indexer feed out of jacket and you have to use the individual ones instead.
ie if i add that indexer into jacket it gives me this address to use http://jackett.home/api/v2.0/indexers/mejortorrent/results/torznab/
go back into jacket and get your torznab feed url for mejortorrent and use that instead to confirm if the indexer works on it own