ReadyNAS 316 invited ReadyCloud users cannot access shares

Hey,

I have a problem regarding the remote access of my ReadyNAS via ReadyCloud - similar to many of the older threads in this forum.

With my ReadyCloud admin account everything works fine. I can access everything without problems. Several month ago, I could also invite other people via ReadyCloud accounts and with these accounts one could see the shares and their subfolders but not necessarily the content of these folders or just some files. We never really resolved the problem and left it at that for a while.

At some point we also made a firmware update to 6.9.3.

Now that I found time I went back to this problem and the situation is much worse. I can invite people to shares and they get an invitation email. In the cloud user list they pop up as additional user with a mail symbol in front of their name. They receive the inviation email, click on the link (before it becomes invalid) and get some positive feedback message. They also see the NAS under the Home tab of their ReadyCloud accounts but the shares don't appear. On the cloud user list visible from the admin account, the mail symbol in front of their name never changes to anything else. We did this now several times and it never works. We also tried different email addresses (some of them are also used for the local accounts, some are not) - it has been suggested in other threads that this should be the main issue (https://community.netgear.com/t5/ReadyCLOUD/Secondary-cloud-user-cannot-connect-Handshake-icon-appearing/td-p/1096884/highlight/false) - but still nothing changed.

Then I also found the suggestion that I should switch off the encryption which I did. It still doesn't work.

Can anyone help me??

Regards