Hello @mario
I got the same pb as you with amazon prime video since latest update 1.0.127 : it stopped working
I mean : no pictures inside the app, no way to change menu (movies, series… etc…) and this yellow circle that kept turning arround, like it was buffering something
So what I did first is that I uninstalled it and install the version from Aptoide but it didn’t help
Then I uninstalled the Aptoide version and I got the same version as before (the one you mentioned 3.0.264.73847) from here : https://apkpure.com/fr/amazon-prime-video/com.amazon.avod.thirdpartyclient/download/264073847-APK
→ I can watch Amazon prime Video again now on my PPM 
Hope it will fix this issue for you also 