Problem: invalid memory address or nil pointer dereference in eventcatcher.go:88
```
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x102b89298]
goroutine 37 [running]:
nostrocket/messaging/eventcatcher.SubscribeToTree(0x1400023c120, 0x1400008e300, 0x1400023c0c0)
/Users/g/nostrocket_repo/engine/messaging/eventcatcher/eventcatcher.go:88 +0x3c8
created by nostrocket/messaging/eventconductor.handleEvents
/Users/g/nostrocket_repo/engine/messaging/eventconductor/eventconductor.go:64 +0x170
exit status 2
make: *** [reset] Error 1
```