Thanks for the PS4 message! No worries, it seemed the issue was the spelling of your gamer tag. ESO is kinda finicky with people's PSN gamer tags being spelled and/or imputed exactly reflective of their PSN name.
Are you on the PS4? Bc with the new PS4 patch, ESO now configured (tweaked) the UI or whatnot, so now the actual PSN friend finder search menu comes up in-game showing a person(s) actual PSN gamer tag.
Case in point is I imputed Theoseres into the PSN search bar, and zero results come back; please advise thanks!