@Kaflecke98 Geo-Blocking, means in that case, Swisscom (Blue Sports) has only the rights to broadcast Live Sports Events in that country they have the rights, and this is only Switzerland. You can get around this by faking a Swiss IP adress via VPN. I'm not sure, if that what I wrote above is the reason why it does not work from abroad for Blue Sports content, for normal Live TV (SF1, ARD, all the other channels) it actually works abroad with VPN. Possibly @LeylaG knows more, but as this not really legal, it could be that Swisscom won't answer this question.
Other suggestion, did you install the VPN properly? here are the indications:
https://www.swisscom.ch/en/residential/help/internet/vpn-server.html