Cannot login to Simplisafe accoutn on iPad or PC/chrome

I have just bought a SimpliSafe system, I want to access my account. On iPad or PC/chrome browser I go to https://simplisafe.co.uk/my-account/login ,  I provide my e-mail and password. I am sent a 6 digit verification code top my phone. I enter that then the SimpliSafe site gets stuck in an endless loop (after redirect to auth.simplisafe.com/u/mfa/detect-browser-capabilities/state?...."

It does not time out or say "incompatible browser " or anything like that.  Whilst maybe not the absolute most up to date browsers, both of my device browsers work fine on all other sites I use.

How do I overcome this please?