No Internet after Update to Catalin

[Guy33]

I have a strange problem
I updated my 2013 MB Pro to Catalina a few hours ago. At first, everything seemed fine, but I soon found out, that I have no longer access to the Internet. I get a wifi-connection but safari/chrome/firefox tell give me a connection error. I also updated my new 2019 iMac, which works without any issues.

Do you have any tips? I already booted in safe mode but that did not change anything.
Re-Downloading OsX and re-installing did not work because after 5mins I got an error message no download possible.

Appreciate every help!

 

[Guy33]

I think I found the problem. When I checked my wifi settings I've noticed a lot of VPN connections. I never noticed them before and clearly not around 20 (!) of them. I somehow managed to clear them all and now everything works fine.
I don't know how I got these vpn's (it VPN Unlimited) since I never installed them. Maybe someone with the same problem will help this solution.