Describe the bug

Do you have an error log of what happened?

TheSeven.zip
lfr_flamelash.zip

Did you try having DeadlyBossMods as the only enabled addon and everything else (especially something like ElvUI) disabled?
No

Which version of DeadlyBossMods are you using?
https://github.com/DeadlyBossMods/DBM-Vanilla/releases/tag/r758