Describe the bug
When entering a dungeon (WC), I get a warning notice that DBM Dungeons (Classic) could not be loaded because it is not designed for Classic WoW.

Do you have an error log of what happened?
No.

To Reproduce

1. Go to Wailing Caverns.
2. Enter dungeon.

Screenshots

Did you try having DeadlyBossMods as the only enabled addon and everything else (especially something like ElvUI) disabled?
Yes. Same warning was generated.

Which version of DeadlyBossMods are you using?
I've got DBM-Core-2.5.3-bc.zip downloaded. I deleted all of the old DBM folders, and installed from the zip file.

Was it working in a previous version? If yes, which was the last good one?

Additional context

Are you playing classic era or burning crusade classic? DBM 2.5.3 is NOT for classic era servers