Shared Review doesn't work with SharePoint

Hello,

I'm at my wits end with this one. I can't get Shared Review working with SharePoint.

I have a site with the users having read/write access to it on SharePoint online 365 and Adobe Standard XI 11.0.23.

During setting up shared review I get a message saying the location isn't valid when it definitely is.

Any hints or tips to get this working?

Thanks in advance.