Error when installing trial of Prime: "The was no endpoint listening..."

Hello,

Could anybody tell me what this error message means? I'm trying to install a trial version of Mathcad Prime and I'm requested to fill in the account information for the PTC-account right before I get prompted with this:

The account in question is upgraded and connected to the company. The link in the message leads to Reset Your Password (although we can log in with the account, there's nothing wrong with the password).

Thank you in advance!

BR,

Heidi