This is an old thread, but I'm running into the same issue right now in Dec. 2023, and the above solutions proposed by user gazumped isn't going to resolve it. Three different clients using the same Evernote Business account have tried to share Notebooks with me and are getting a small red box popup at the top, center of the screen with the text, "Failed to Share Notebook."
When I go into their account as an admin and check the Notebook's share settings, it indicates that I am counted as someone "Who has access," with a "Pending" status, but the Notebook never makes it to me in my "Shared With Me" area for me to accept the invitation. So clearly something has broken down along the way. So far, I've tried rescinding permissions to myself, and shared the Notebook to myself again, but I still get the same error message and no access to the Notebook in all three client's cases.
Another thing that I tried, and worked only once for reasons I cannot fathom is that I shared an individual note from inside the notebook in questions, and that note was successful shared with me. When I located the note among my Evernote notes, it automatically subscribed me to the Notebook that I was previously not able to subscribe to. Weird, right? But it only worked once and never again.
Again, this issue has now occurred three times now in the space of three days with three different users, and I cannot figure out a workaround. Conversely, other clients in the same ecosystem are having no problems whatsoever sharing they notebooks with me. My organization needs to be able to share notebooks between clients. Turning notes into PDFs to be shared via an extra-Evernote method or archiving Notebooks, then restoring them elsewhere are not workarounds that are going to work here, especially considering my organization is paying for this business account specifically because of this sharing functionality.
Is anyone else experiencing this? More importantly, does anyone have any ideas on how to fix it?
Everyone in my organization is using iPads updated to at least 16.7.2