Using the most current version of Classic, I do not have an option to view other inventories of character on my account. As well, when trying to display my bank while out in the world, nothing shows. Instead, I am greeted with an empty, default bank (no bag upgrades).

Not sure if this is interfered with by ElvUI.

I have the same issue. It appeared after trying other bag addons and going back to Bagnon. Have removed all cached settings in SavedVariables and removed other bag addons and reinstalled Bagnon. Still can not see any other character items or gold.

Hey, so this issue JUST happened to me 2 days ago after updating several addons (people tell me I run too many addons lol). The issue is quite frustrating, but for me the fix was so simple it sorta made me smh at myself. Apparently, when updating the addon, the one piece which is responsible for us being able to see our items across the account regardless of which toon or which bag (bank or inventory) they're in is turned off by default. This is a setting I've never changed myself. So to fix it, simply open options in WoW wherever you like, and click into the "AddOns" button. This will show you a list of all of your installed addons and which ones are currently being used. Find "Bagnon" in this list. Right above it should be "Bag Brother". Make sure this addon is turned on. It's not something you downloaded separately on your own, so you might not even know it's in there. This is a feature of Bagnon, which comes with it, and is the part of the addon which resolves item counts across your entire account.

Hope this is helpful.

Made an account specifically to report the same issue as the poster above me. I personally do not have ElvUI, so I feel interference there can be ruled out. I turned off all of my addons and still the issue appeared. I'd also like to add, that as well as not displaying bank contents, items also held by my alts are not shared on the tooltip as they used to be. There doesn't seem to be any form of communication between the your view of your current bag and your bank, alt inventory, or anything of that nature.