UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'name' of undefined

My apollo.config.js is:
```
module.exports = {
client: {
service: {
name: 'pelas-graphQL',
url: 'http://api.pelas.co/graphql',
},
},
};
```
I get this error in my vscode log.
```
(node:10372) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'name' of undefined
at Object.visitor (c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\apollo-language-server\lib\errors\validation.js:102:96)
at Object.enter (c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\graphql\language\visitor.js:323:29)
at Object.enter (c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\graphql\utilities\TypeInfo.js:370:25)
at Object.visit (c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\graphql\language\visitor.js:243:26)
at Object.getValidationErrors (c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\apollo-language-server\lib\errors\validation.js:26:15)
at Object.collectExecutableDefinitionDiagnositics (c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\apollo-language-server\lib\diagnostics.js:14:38)
at GraphQLClientProject.validate (c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\apollo-language-server\lib\project\client.js:182:65)
at c:\Users\Masih-Jahangiri\.vscode\extensions\apollographql.vscode-apollo-1.17.0\node_modules\apollo-language-server\lib\workspace.js:58:46
at processTicksAndRejections (internal/process/task_queues.js:94:5)
(node:10372) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:10372) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
```
**Versions**
Apollo GraphQL vscode plugin: v1.17.0

VScode:
Version: 1.51.1 (user setup)
Commit: e5a624b788d92b8d34d1392e4c4d9789406efe8f
Date: 2020-11-10T23:34:32.027Z
Electron: 9.3.3
Chrome: 83.0.4103.122
Node.js: 12.14.1
V8: 8.3.110.13-electron.0
OS: Windows_NT x64 10.0.18363

Start at apollo-language-server/lib/errors/validation.js:102, then trace the callers in diagnostics.js, project/client.js, and workspace.js shown in the stack trace. Reproduce the warning with the supplied apollo.config.js and Apollo VSCode plugin version; done means the configuration no longer produces an unhandled rejection.

Written by the indexing model from the issue text.