There could be many reasons why you're unable to connect to a server or it disconnects randomy, these may include but are not limited to:

1. Software on your computer preventing Windscribe from connecting. This may include anti-virus, anti-malware or personal firewalls.
2. Network that you're on is blocking or interfering with VPN connections. This may include school and corporate networks.
3. Your Internet may be too slow.
4. It's the full moon.

See the Slow Speeds guide as the solutions there will be applicable in this case.

If all else fails, please make a connection attempt, wait 2 minutes, make sure you have Internet connectivity (disconnect if you don't) and then go into Preferences, in the Debug tab, click "Send Log", then create a support ticket so we could have a look. If the log fails to send, click "View Log" and copy/paste the log into the support ticket.