bitcoind – Setting up an Electrs server for a local network

I have a machine (192.168.1.66) on my local network serving Electrs synced to the tip (netstat -ntlp shows electricity receiving from 127.0.0.1:50001). However, there is another system (192.168.1.68) using SparrowWallet/ElectrumWallet that cannot connect to the system hosting Electrs (e.g. ./ElectrumWallet –server 192.168.1.66:50001:t will not connect/SparrowWallet refuses to connect) displays). problem? I’m also wondering if using elector as a trezor backend requires encryption or if it can run unencrypted.