Possible ISP block

For quite a while I can no longer connect to any remote devices from my computer. I get this message "Not ready. Please check your connection" and the log file shows this:

LOG content removed

I think I've tried everything:

• Uninstalling teamviewer
• Restarting the service from the Services panel on Windows 10
• Disabled my personal antivirus (Bitdefender Total Security)
• Disabled Windows Firewall
• Flushed the DNS via cmd with "ipconfig /flushdns"

I can't even use my android tabled and phone with Teamviewer under my home network, but if I start using the 4G data network, everything is OK. I'm starting to consider it's an ISP related problem. I live in Italy and I have Telecom (also called TIM, the new brand name). Any idea?