Hello Gundam
First of all, good day.
As long as you cannot see the QR code, this either generated by EasyRide or through the purchase of a p2p ticket, you do not have a valid ticket and consequently, you cannot get on board a public transit service.
Every day, thousands of people use the SBB Mobile app for ticketing. If there was a general issue, thousands of people would face the same problem.
I think the problem is rather your device (GPS signal) or the settings. For instance, NordVPN can have an impact on the proper running of EasyRide.
It is clear, at the beginning of the week, a lot of people call SBB. Try later in the week or use the contact form made for that purpose:
https://sbb-tickets.cc/en/help-and-contact/my-travelcards/travel-without-valid-ticket/rechnung-formular.html
Kind regards,
Roland