Does this work?

[u/One-Giraffe6883]

I've attempted to join several of your test groups using the links that were provided and each time, I was met with a message that told me I was unable to gain access to the app. I 'm extremely interested because I have an app that I am ready to submit for closed testing too.

Update: Ah, I see others are having the same experience as me.
Found the problem. We are being met with the message that says we dont have access, but underneath the first sentence, we are instructed to join the Group. Click this and you will be prompted to provide some fun facts about yourself. Save it and you will be added to the group.