UnhandledPromiseRejectionWarning: Unhandled promise rejection

[hyphen1370]

Hello,

I follow this link to create a simple express-graphql server:
https://graphql.org/graphql-js/running-an-express-graphql-server/

When I start the server, I got this error:
(node:23847) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'length' of null
[2021-09-28T19:52:22.167Z] at ServerResponse._send (http_outgoing.js:322:33)
[2021-09-28T19:52:22.167Z] at write (_http_outgoing.js:744:15)
[2021-09-28T19:52:22.167Z] at ServerResponse.write (_http_outgoing.js:687:15)
[2021-09-28T19:52:22.168Z] at writetop (/mnt/d/AzureFunctions/OMAXITToolsFrontend/node_modules/express-session/index.js:295:26)
[2021-09-28T19:52:22.168Z] at ServerResponse.end (/mnt/d/AzureFunctions/OMAXITToolsFrontend/node_modules/express-session/index.js:356:16)
[2021-09-28T19:52:22.168Z] at ServerResponse.send (/mnt/d/AzureFunctions/OMAXITToolsFrontend/node_modules/express/lib/response.js:221:10)
[2021-09-28T19:52:22.169Z] at ServerResponse.json (/mnt/d/AzureFunctions/OMAXITToolsFrontend/node_modules/express/lib/response.js:267:15)
[2021-09-28T19:52:22.169Z] at graphqlMiddleware (/mnt/d/AzureFunctions/OMAXITToolsFrontend/node_modules/express-graphql/index.js:198:22)
[2021-09-28T19:52:22.169Z] (node:23847) 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(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)[2021-09-28T19:52:22.169Z] Executed 'Functions.OMAXITToolsFrontend' (Succeeded, Id=04dce77a-4e8e-40fe-ab7e-819666ec5d04, Duration=614ms)

[2021-09-28T19:52:22.170Z] (node:23847) [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.

How could I make this error disappear or put a try and catch block to stop the warning?

Thanks

[enisdenjo]

This library has been deprecated and this repo will be archived soon. It has been superseded by graphql-http.

Furthermore, if you seek a fully-featured, well-maintained and performant server - I heavily recommend GraphQL Yoga!