I don't really have a way to explain what's going on, outside of I logged in to the game today and was able to use AdiBags as normal, and then after doing 3 island expeditions in World of Warcraft (retail version) I came across an issue that no longer allows me to open my bags, and instead produces the attached error codes.

I truly have no idea what's caused the issue; I have tried disabling and reenabling the addon, clearing the cache, uninstalling and reinstalling the addon, and nothing seems to be correcting the issue.

Hope these screenshots help!

After a bit more digging, I have discovered the reasoning behind the error code.

When you update to the most recent version of the addon, it is coded for the CLASSIC version of the game, and not the RETAIL version. Why it auto updates to the classic version and doesn't have it's own separate section for Classic Addons versus Retail addons, I have no idea.

Leaving this up here in case anyone else has the same problems I did.