Can't install apk

[Hohepa]

My friend is developing an application for me and he has sent through an updated APK for me to download to see how it's going. Despite adjusting all the permissions to allow the appropriate apps to install apk's from unknown sources it still will not install the apk.

When I attempt to isntall i'm greeted with a screen that says

"do you want to install this application? It doesn not require any special access."

After I hit install is gives me a warning screen that says app not installed with a triangle/ exclamation mark in the middle.

I have changed the appropriate permissions, but based on the fact that it 'doesn't require special access' i'm wondering if I'm doing the right thing??

Any help would be great, very frustrating.

[BandOfBrothers]

Usually allowing from unknown sources works @Hohepa 

Also going I to your myfiles and going into the apk files section there can work too.

If its not working then I'm wondering if that Apk is compatible with your phone.

[Hohepa]

I found the solution on another post in the end, I had to delete the google play cache, and now it works.

Cheers though!

[Hohepa]

https://eu.community.samsung.com/t5/Galaxy-S9-S9/App-APK-installing-problem-in-Android-Pie/td-p/9592...

Have a browse here if anyone's having the same issue!

[BS12]

Hi

Hope you recitfy the problem. The same problemitic condition at  present i am. can you guide me to rectify the issue..

[Shenrik]

I have the same issue. I tried what is above listed - but still installation fails.
 
I have Samsung Galaxy GT-19515 / Android 5.0.1.
 
This is VERY annoying: I develop an app, and struggle with teh very basic step "check release version apk on phone without Google Play".