1. Try to media manage offline. Open new project in fcp and save xml without reconnecting offline media. Load resolve – add isis path to prefs. Reload resolve. Import xml, point to isis when asked for media.
2. If didnt help. Try to browse manually isis storage and load more than 50 clips to media pool from isis. Make default timeline and try to play and put some grades. If ok, make one shot xml from fcp and try to load it. If ok make 10 shot xml and load it. If ok than probably there are some broken footage which causes crash if not – I dont know.