There are a few - already closed - topics on this topic, but it still occurs to me.
Of course I tested it with https://push.bdrive.com/ and ‘It works’
The strange thing is, if I open an OpenVPN connection to a completely different server, but with the same provider, the message disappears ! Perhaps this will help solve the problem?
My provider ‘TransIP’ offers paid storage space through their product ‘Stack’. I load those virtual spaces via SFTP with NetDrive.
We rent a VPS (Virtual Private Server) from the same provider ‘TransIP’ that I access with OpenVPN.