Visual error indicator when loading an invalid gRPC proto file

[nbgraham]

When loading an invalid proto file, there is no visual indication that it didn't work or why

such as

syntax = "proto3";

message Foo {
   ok bool = 1;
}

service FooService {
    rpc GetFoo(Foo) returns (Foo) {}
}

Should be bool ok = 1;

Logs

[2023-07-25 11:46:49.906] [error] Error occurred in handler for 'grpc.loadMethods': Error: no such Type or Enum 'ok' in Type .Foo
    at Type.lookupTypeOrEnum (/Applications/Insomnia.app/Contents/Resources/app.asar/node_modules/protobufjs/src/namespace.js:410:15)
    at Field.resolve (/Applications/Insomnia.app/Contents/Resources/app.asar/node_modules/protobufjs/src/field.js:268:94)
    at Type.resolveAll (/Applications/Insomnia.app/Contents/Resources/app.asar/node_modules/protobufjs/src/type.js:304:21)
    at Root.resolveAll (/Applications/Insomnia.app/Contents/Resources/app.asar/node_modules/protobufjs/src/namespace.js:307:25)
    at Root.resolveAll (/Applications/Insomnia.app/Contents/Resources/app.asar/node_modules/protobufjs/src/root.js:259:43)
    at loadProtosWithOptions (/Applications/Insomnia.app/Contents/Resources/app.asar/node_modules/@grpc/proto-loader/build/src/util.js:54:16)
    at async loadMethodsFromFilePath (/Applications/Insomnia.app/Contents/Resources/app.asar/main.min.js:40577:24)
    at async loadMethods (/Applications/Insomnia.app/Contents/Resources/app.asar/main.min.js:40590:19)
    at async node:electron/js2c/browser_init:2:97830

Similar to #6194

[nbgraham]

This is especially confusing if there are existing methods from before and you change the URL and try to do reflection again. There is no error message and the old methods are still selectable.