So I dismissed J'Zargo just before returning to the COllege of Winterhold from Mzulft, with the intent to recruit him again once I got back because I heard there were terrible bugs that could happen if you came back after that quest with a follower - and now I can't recruit him again; he apparently has no dialogue anymore beyond the greeting line "J'Zargo is sure this is the end. And this was supposed to be a safe place..." How do I fix this? I'd like him back, the only two Khajiit at the college gotta stick together...

Is there a console command to force a dialogue tree to start? Foolishly, I let him go while he was still carrying some of my stuff.