How to get access to Testflight app on iOS?

Hi all, I’m new to Bunpro and keen to be able to do it on my phone, however, the link which is meant to grant access to the app does not seem to be working. It just takes me to the info page as you can see in this image:

I have downloaded Testflight and I am doing this on my iPhone. Am I still doing something wrong here or is the link broken?

Thank you in advance

My app actually just quit working because it said the testflight had expired.

@hokkaidohotrod1868 @kwrty There’s still 70 days on it.

mine did too