So I've been through all cities oblivion gate but Skingards. The thing is it keeps crashing when I'm walking up to the gate. I have no mods at all how can I fix this crashing problem?

Is this with the same save?

Are you playing the Mages guild quest as well?

You can also ignore Skingrad for the Allies for Bruma quest, you might have a slightly different dialogue from the countess, but three guys won't make a difference in the battle.

No I tried 2 other save and still crashes. No I'm not playing the Mages guild quest. Thanks I'll just continue the quest without Skingrad.