Proxy Error: Cannot read properties of null (reading 'toString') (see more in sp-rest-proxy console)

[kadut001]

Response Error
{
"readyState": 4,
"responseText": "Proxy Error: Cannot read properties of null (reading 'toString') (see more in sp-rest-proxy console)",
"status": 400,
"statusText": "Bad Request"
}

Console Log Message

GET: https://redacted.sharepoint.us/_api/web/siteusers?
Error TypeError: Cannot read properties of null (reading 'toString')
at OnDemand.saveAuthData (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\node-sp-auth\lib\src\auth\resolvers\OnDemand\OnDemand.js:83:44)
at OnDemand.getAuth (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\node-sp-auth\lib\src\auth\resolvers\OnDemand\OnDemand.js:38:28)
at Object.getAuth (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\node-sp-auth\lib\src\index.js:16:76)
at SPClient. (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\sp-rest-proxy\dist\utils\client.js:69:51)
at step (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\sp-rest-proxy\dist\utils\client.js:44:23)
at Object.next (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\sp-rest-proxy\dist\utils\client.js:25:53)
at C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\sp-rest-proxy\dist\utils\client.js:19:71
at new Promise ()
at __awaiter (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\sp-rest-proxy\dist\utils\client.js:15:12)
at SPClient.fetch (C:\Users\kofi.adutwum\Documents\Page\sandbox\node_modules\sp-rest-proxy\dist\utils\client.js:65:20)

I'm trying to use on demand electron credentials for this proxy.
Any solution to this issue?

Thank you!

[koltyakov]

Hi @kadut001,

It's definitely auth thing. On-Demand might be picky to Electron version.

Could you try separating concerns by checking auth via https://github.com/koltyakov/node-sp-auth-troubleshoot raw minimal console approach?

If doesn't work please post to auth library repo https://github.com/s-KaiNet/node-sp-auth

[kadut001]

Hi @koltyakov,

Thank you. It resolved my problem!

[smailsw]

@kadut001 i have the same issue, can you provide me please with your solution ? thank you

[kadut001]

Hi @smailsw

Here are my solution

1. git clone https://github.com/koltyakov/node-sp-auth-troubleshoot
2. cd node-sp-auth-troubleshoot
3. npm install
4. npm run test -- --env uat

I have to run npm run test -- --env uat every 24 hours because the cookies expire but you can put the commands in batch script and have the batch on a scheduler.

Please let me know if it does not work