I would first start out by:
1. Increasing the CPC BID to at least $2.00 if you have not already
2. Increase the daily budget to minimum $30/day
**as that may be whats limiting it.**
also make sure you don’t have any negative audiences setup that might be affecting it under your audiences menu.
**If that don’t work (give it at least 3 full days after you make that adjustment)**
**reach out to your Google rep by chat and ask them to push the reset button to unjar the system as it may still be something on their end.**
Thats what I usually do when / if this happens to me.
Hope this helps. Good luck!