Can't install a specific app. Play Store error 504 / PS website says already Installed

[AC Question]

Hello, I am trying to install an app (AforeMovil) from the Play Store; the app downloads and when it goes to "Installing..." it tells me the app cannot be installed and gives error code 504. When going to the Play Store website it says the app is already installed, but the app or its data are nowhere to be found in my phone. Other apps install without any problems.

I have a ZTE Blade V6 running Android 5.0.2. I have 2GB free.

So far I have tried the following with no success:

1. Rebooting the phone.
2. Removing and readding Google account.
3. Clearing the cache and the data for the Play Store and Play Store Services.
4. Uninstalling updates for Play Store.
5. Changing the time and date.
6. Downloading with wifi and with mobile data.
7. Installing in Safe Mode.
8. Clearing the cache and data for Google Service Framework (this led to a different error, RH-01, which didn't let me access the Store. This was solved by removing and readding the Google account).
9. Downloading Clean Master and deleting all junk files.

Any suggestions would be greatly appreciated.

 

[Javier P]

Welcome to the forums. You have already tried almost everything short of a factory reset. It's possible that there's a conflict with another app from the same devs already installed in your phone. There are different afore apps in the Play Store, do you have any of them?

Also, if you see the reviews for those apps most of them are very negative. Have you already contacted the devs?