An Error Connecting to the Apple ID Server

Hi,

we have just reinstalled our Mac,

updated to OS High Sierra,

installed XCode 10.1


We need to reconnect developer account, so we go to Preferences>Account>Add Apple ID,

we put our credentials (tested on apple developer website),

but we still receive error "An Error Connecting to the Apple ID Server",

any idea?

We are blocked and we can't work on our apps!!


Thanks