Internal App Sharing - Stuck on loading screen after clicking the url

I have an app that its being shared through internal app sharing to anyone with the url. However, some people are unable to download it, because after clicking the link, the Play Store gets stuck in a loading screen.

It's configured to whomever has the link to be able to install it, without email lists. I tried on two phones with different google accounts, only with my personal account was I able to download it (which is not in any email list). If I log with my account on the other phone, it works.

I tried adding other emails to the list and restricting access to people that are in the list, but they still got the same problem, and even leaving my email out of the list, I can still download it.

My personal account is not the developer account which is publishing the app.

The only change these last weeks was unpublishing the app from the store. Could that be the cause? Does the app need to be available on the store (it was approved, I just unpublished it)?

If you unpublished the app, this means that public links will no longer reach your app, since it no longer exists for download.

You need to re-publish your app for other people to see it.

If I'm not mistaken you are using a link that looks like this to invite other people https://play.google.com/apps/internaltest/APP_ID right?

If the app is published, and the users are still stuck on the invite screen, then it might be that they have multiple google accounts associated to their phone, so they have to change it accordingly. (The white square box at the top right corner is the one to switch accounts)