@d0ugmac1 Yes - I can log in to Omada Cloud with this e-mail via website, where I can see my OC200 correctly bind to cloud:

@d0ugmac1 Unfortunately, using the mobile Internet, I will not have access to devices in the local network.

@d0ugmac1 and this is the error from mobile app, very wierd:

@d0ugmac1 Yes. I have correctly bind to cloud services another Omada Controller OC200 5.7.6. The problem is only in the docker instance. Should I firstly unbind my OC200?

@d0ugmac1 I also use host network:

Hello, I have a problem to bind my controller (docker on Synology NAS, version 5.9.9) to cloud. SMTP server is configured correctly - I can send test mail. Mail alerts also is enabled. My error is:...