Help needed on Android 6.0


It’s about Android 6.0 and a tablet (Lenovo Tab 8 3)
I want my kid to be able to use this tablet with a restricted profile.
But Seafile client can’t add an account, the message states something like the admin does not allow to create the account. With the normal user profile Seafile works well.
I did not find a way to permit the restricted user to create an account, that seems really insane…
Any workaround for this -other than have the kid a full access profile- ?
He really will need to access data on our Seafile server.

Thanks in advance

Spooky but got problem with Lenovo Tab 8 but not this error…