Downloading Apps From Google App Store Failed

Dec 6, 2015
I´ve a Problem with the Goggle Appstore. I can´t download apps or updates. I must open the Download Manager and use the "three Points" to "Start all" . Then is the Google Appstore downloading one file. Must do it every update for app. This issue ist since Rom libra 26.2.16 and also in all follow roms. I delete Cache from the apps Google Playstore and Download Manager but also Dalvik. Delete and reinstall the App Store. Nothing helps.