Describe the bug
For Classic version of the addon, whenever you enter a raid with debug enabled, we get a message saying that the current difficulty is 176 - nil
I know the Classic and Retail difficulty variables are not equal, which might be some of the reason this acts up.
As a resault, PRT wont load inside Ulduar 25 when tested.

To Reproduce
Steps to reproduce the behavior:

1. Enable Debug Mode
2. Enter Ulduar on 25 man
3. Read debug message

Expected behavior
What I expected was for PRT to load, and after changing encounter ids to classic Ids they would trigger. But as the addon wont load inside the zone at all, we end up with nothing.

Screenshots

Additional context
As with Encounter IDs, Classic operates of different IDs for bosses , encounters and difficulty, as per say Ulduar falls into the category of 176 for 25 Man mode, 175 for 10 man mode.
Sry prior mislabeled Bug repport.

Pull request is merged. Will be present in 2.36.1

Fixed the issue by going into Eventhandler, and changing the difficulty IDs for Wrath based on this list:
https://wowpedia.fandom.com/wiki/DifficultyID (classic one further down)

If you already fixed so it works you could push a pull request so I don't have to do it again :)