Latest alpha v9.0.1-alpha-1 throws errors upon login on Retail.
Getting 4 of this on every login/reload. Only addons enabled are BugGrabber, BugSack and Simulationcraft.

96x Couldn't find inherited node: BackdropTemplate

The alpha version is intended for Shadowlands. Revert back to the Release version for retail compatibility.

It may eventually work with both, however it requires a slight refactoring/rearchitecting of some of the code (that is not related to what you linked to).

Okay, thanks, I only thought it's supposed to work in 8.3 due to this line 99ae99a#diff-676a4a4e1e11d8a49b083eb4080db4faR742.