As announced on the Ubisoft support Twitter page, as of right now the servers for Ghost Recon: Wildlands' open beta are now down, but shouldn't be for too long:
"A maintenance is currently ongoing on all platforms for GR: Wildlands Open Beta. Estimated downtime: 30 mins. Sorry for the inconvenience."
This isn't the first time, however, as the Twitter page has stated a few times that maintenance has been occurring on the servers and that some players are having issues, one of which is a UYNUI-00001 message, one which the studio are investigating.
Is this a frustrating problem, or just an inevitable issue with beta stages?