I am having the exact same error, in the Old City and Old City Overlook.
Here are 5 crash.dmp,error.log and output_log files. https://1drv.ms/f/s!Ag7LKzTENXNbl_Z2ytCLyQaxwnrIIg
All of them consistantly crash at :
-- Tutorial Trigger matched multiple items: CombatStart
-- Skeleton for 'CRE_Cave_Grub (1){ENHP}' missed more than 50% of bones in BoneMapping 'CRE_Grub'. Is that the right mapping?
Hope this helps,
Jason