Wanted: Kernel Panic crashes macbook air 2011, REPAIR/FIX

My macbook air 2011 is working fine, but is crashing twice daily due to a kernal panic:
"zalloc: zone map exhausted while allocating from zone kalloc.8192, likely due to memory leak in zone vm objects"

A few weeks back, I accidently deleted all system caches which rendered my programs with authentication certs, so I timemachine reinstalled my apps, and shortly after that my computer began crashing, and when doing basic things like have chrome open get very loud with the fan running loudly.

The process on activity monitor, fontworker, is always at the top, and reappears even after a safe book and repairing the permissions. It's taking up 70-90% of memory.

Let me know if you can fix this problem.

Computer was 100% working well before the cache deletion/ app reinstall.