Cannot read property 'length' of undefined

[ChristianMok]

Hi there!
I am getting this error message every 4 or 5 days. I don't know the causes of this problem, it is working perfectly most of the time. The error message is
`C:\Program Files\iisnode\www\DirApi2\node_modules\node-sp-auth\lib\src\auth\reso
lvers\OnlineUserCredentials.js:55
for (let i = 0; i < response.headers['set-cookie'].length; i++) {
^
TypeError: Cannot read property 'length' of undefined
at C:\Program Files\iisnode\www\DirApi2\node_modules\node-sp-auth\lib\src\au
th\resolvers\OnlineUserCredentials.js:55:64
at runMicrotasks ()
at processTicksAndRejections (node:internal/process/task_queues:93:5)
npm ERR! code 1
npm ERR! path C:\Program Files\iisnode\www\DirApi2
npm ERR! command failed
npm ERR! command C:\Windows\system32\cmd.exe /d /s /c "node index.js"

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\cmo\AppData\Local\npm-cache_logs\2021-03-03T17_46_23_611Z
-debug.log`

Can you help me? and How can I avoid this? This problem will cause the express down, so the app is down. Thank you

[ChristianMok]

I am using SAML based with user credentials