there are not any active connections in my wallet. my wallet was synced and worked yesterday, but now not work.
please help me

I have 16 active connections.
I added these nodes:
addnode=104.236.231.72
addnode=45.55.172.95
addnode=174.127.110.41
My wallet is win 32 bit and I don't have a conf file from the beginning, but my wallet was worked with 1 activeconnections yesterday, please help me for create conf file and how to sync my wallet?
what is full content of conf file and what is correct spell of conf file name?
thanks for your help