Hi! I come from "Desire", another MN coin which is having the WATCHDOG_EXPIRED problem. I've build a standalone version of sentinel (it doesn't require any dependencies, namely python and so on, and can be run from a single EXE file).
rpcport=9998
rpcconnect=127.0.0.1
does the port have to state 9998 or does it have to be the same port the masternode is running on?