Blizzard unified the Addon APIs between Retail and Classic ERA.
This breaks some functions within the addon.
I was able to get some things going, mainly by removing GetMinResize() et all, but am now stuck with more in-depth errors.
Is there a way to sponsor fixing these because I know: time is precious.

Hit me up :)
Thanks in advance.

I don't have an active WoW subscription right now. What sort of errors are you seeing? Are they in calls made by the addon directly or its libraries?