Blackbox error when moving to next map

[TheGreatCthulhu]

"So people in my mod have been getting a blackbox error"

But you yourself cannot reproduce the error on your own machine?
If so, you should still follow Mugbill's advice - except that you'll need to tell your players to delete the cache files.

Looks like that really might be the cause of the problem - according to the last few lines in the log:

-------- Loading map '62_gtest_panic.map' ---------
ERROR: Could not open binary file 'C:/games/Amnesia The Dark Descentsss/maps/thefugitive3/62_gtest_panic.map_cache'
ERROR: Could not map cache file 'C:/games/Amnesia The Dark Descentsss/maps/thefugitive3/62_gtest_panic.map'.