Unfortunately the meloo fix is an integral part of the repack and not optional. I will however add a note that it is not compatible with Byg's Grim Reality.
I can only conclude that a file from BGR overwrites a file of the meloo fix that another file from meloo is dependent on. And if it is a crash to menu then it will be based in the descr_strat file and most likely be a invalid trait issue, eg go back to the descr_character traits file that BRG also modifies.
If you could upload a crash log from your installation then we may have a chance to find the issue.