Can't download from Play Store - need new ideas to try

I've had this Moto X (1st ed) for a few years. For the last 3 weeks or so I've been unable to use the Play Store to update any of my apps or to download any new ones. The store otherwise works just fine: I get notification of updates, I can browse the store...

Problem is, once I hit Update or Accept to update or install, the status shown is stuck at Downloading... indefinitely with no progress; even if I let it sit for hours, there is never any error message. Here's what I've already tried:

1. Made sure there is enough space to install/update apps


2. Cleared the cache for Play Store and Play Services apps, and restarted the phone.


3. Uninstalled Play Store updates Settings >> Apps >> Google Play Store >> Uninstall Updates and restarted the phone. Even the old version of the store wouldn't download anything.


4. Used a mirror site to download and update Google App, Google Play Store, and Google Play Services to the most recent version (more recent than what I had before #3). I think these APKs were genuine since the signatures must have matched what was already installed or the update would have been blocked


5. Switched from WiFi to Cell data.

I've gone through the similar questions from the troubleshooting FAQ but didn't come across something else to try. Any help would be welcome.

• Moto X on Android 5.1


• Google Play Services 10.5.53


• Google Play Store 7.7.09.N-all