Error: could not detect network

[brunowanderson7]

`Unhandled Runtime Error
Error: could not detect network (event="noNetwork", code=NETWORK_ERROR, version=providers/5.4.3)

Call Stack
Logger.makeError
node_modules@ethersproject\logger\lib.esm\index.js (224:0)
Logger.throwError
node_modules@ethersproject\logger\lib.esm\index.js (233:0)
JsonRpcProvider.eval
node_modules@ethersproject\providers\lib.esm\json-rpc-provider.js (350:0)
Generator.throw

rejected
node_modules@ethersproject\providers\lib.esm\json-rpc-provider.js (6:41)`

I'm having this problem when I select the source network, could someone help please?