Fabric installer page on Safari for iPadOS 13.1 is not recognized as a "device"

Question

I recently updated to iPadOS 13.1 and I can't get "Beta by Crashlytics" to accept an iPad Pro 12" as a device that can install the required software from https://apps.crashlytics.com/register/...

I am met by a screen that says

                                Beta by Crashlytics

Open the invitation email on your device to begin registering for beta testing

Can I do anything to make Safari on iPadOS 13.1 accept my invitation, or do I have to wait for a bugfix for this?

Thanks.

Alternate answer

Thanks to iCediCe for showing me in the right direction. Following their advice made me realize there is an even easier way.

The easier way - instead of making all webpages conform to mobile - you can make a specific webpage conform to mobile.

Press aA on the leftmost point of the address bar in Safari, a menu pops up and there you can select "Request Mobile Website". After that Crashlytics/Beta will show up.

Answer 1

Goto Settings -> Safari -> Request Desktop Website -> All websites and disable it. This will cause it to use iOS user agent string not macOS user agent string thous making it work again.