Do you have an error log of what happened?
2x DBM-PvP\PvPGeneral.lua:37: attempt to call method 'UnsubscribeAssault' (a nil value)
DBM-PvP\PvPGeneral.lua:37: in function 'handler'
DBM-Core\DBM-Core-1.13.24.lua:817: in function <DBM-Core\DBM-Core.lua:804>

To Reproduce

1. Finish AV

Screenshots

Did you try having DeadlyBossMods as the only enabled addon and everything else (especially something like ElvUI) disabled?

Which version of DeadlyBossMods are you using?
DBM-PvP-r76-2-gd8c02ac-classic / DBM 1.13.24-classic
Was it working in a previous version? If yes, which was the last good one?

Additional context

I can't really figure out why this error is happening, it may simply be because of error 3 or 4 that caused mod to have incomplete load. This error might also be fixed by having fixed other two, so you'd just have to try again.

Might be a bit before I'm back doing BGs but I've updated and I'll keep it in mind.

Message: Interface\AddOns\DBM-PvP\PvPGeneral.lua:63: attempt to call global 'GetPlayerFactionGroup' (a nil value)
Time: Sat Dec 14 10:55:18 2019
Count: 1
Stack: Interface\AddOns\DBM-PvP\PvPGeneral.lua:63: attempt to call global 'GetPlayerFactionGroup' (a nil value)

Locals:

Message: Interface\AddOns\DBM-PvP\Battlegrounds\Alterac.lua:73: DBM-PvP_Tooltip:SetHyperlink(): Unknown link type
Time: Sat Dec 14 10:55:18 2019
Count: 1
Stack: Interface\AddOns\DBM-PvP\Battlegrounds\Alterac.lua:73: DBM-PvP_Tooltip:SetHyperlink(): Unknown link type

Locals:

Message: (null)
Time: Sat Dec 14 10:55:18 2019
Count: 6
Stack: (null)

Locals:

those errors aer all fixed in alpha version. there just hasn't been a new release yet because outside of having less errors, they still don't actually support the BG yet

thats nice to hear, thank you for ur work!