Assuming that this is caused by the mods (disable them all and check if it crashes, then I'd just be a case of just disabling some, testing for crashes, rinse, repeat.
On the other hand, if it crashes with all mods disabled, then try repairing the client, or verify integrity if you're using Steam.
It probably won't point to anything more than the generic dragon age exe, but it's worth checking to see if any mod references show up in your reliability report. To check this, open the seach bar and type "relia". Choose the Reliability Monitor option, then check for the red X's that indicates the DA: O crash. If this references a mod, then disable this one first and test again.