Updated imports and screenshots for the Classic WoW DPS/TANK UI on wago! 26/10/2019
Luckyone#4689 Discord | Luckyone1996 Twitch
Looks like you have Dragon Overlay enabled from Project Azilroka. If you have Project Azilroka enabled - go into the options and uncheck Dragon Overlay.
Yep that is ProjectAzilroka Dragon Overlay, as already mentioned by Botanica. /ec - ProjectAzilroka - Dragon Overlay