From what you provided, my only guess is that "nPocket" is a value equal or higher than the size of the "m_apPocket" array, which causes an issue when trying to call "IsExpired()".
When debugging you should have a callstack tab somewhere (in vs19 it's bottom right by default, I think it's safe to assume it's the same in vs22), which shows which functions were called at the stop point. Roughly summarized, it works in a chain like this: Line 1 was called by Line 2, itself called by Line 3, etc...
In that callstack, there's only 2 lines you'll want to pay attention to. The first one, I believe, is "CPocketController::IsAvailable", which is the function called causing this error. The second one we don't know, but it is a function that calls the former and passes it the presumed faulty argument "nPocket", so we need to figure out which it is. Logically, it should be located lower in the callstack, so anything above can be ignored.
Try to find that second function, and find out what the value passed as "nPocket" is, and if it exceeds the amount of pockets given to a player.
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