I have changed the directory and get the following error message when running Electrum (bwt) with Bitcoin Core at the same time.
https://i.imgur.com/RcpyK2e.png18443 is the default rpc port for regtest, are you on regtest?
Are you able to access the RPC port by other means? You can try opening
http://localhost:18443/ in your browser. If this works, you should see `JSONRPC server handles only POST requests`.
