Chosen Solution
The recent applications manager on my tablet just suddenly stopped working one day and now whenever I try to open it an error message pops up saying “Unfortunately, the process com.android.systemui has stopped.” then it goes to the lock screen.
I just ran into this problem today at the shop and I was able to resolve the issue by going to Settings - Application Manager - Google App - Uninstall updates. Let me know if that helps your problem! Jason Device Savers - Tampa