Showing results for 
Search instead for 
Did you mean: 
Kudo Kingpin
Kudo Kingpin

[URGENT] Error while using PowerApps Studio



I'm always getting an error while using PowerApps Studio on Web version.

This is the error:

WebAuthoring abnormal termination.
Client date/time: 2017-07-19T16:10:23.307Z
Version: 2.0.663
Session ID: 67ee0322-37d0-0a7f-8b80-147321ccb38c
description: {"error":{"isTrusted":true,"detail":{"exception":{}},"message":"Uncaught TypeError: Cannot read property 'length' of null","filename":"","lineno":... TypeError: Cannot read property 'length' of null","setPromise":"[function]","exception":{}}
stack: null
errorNumber: 0
errorMessage: Uncaught TypeError: Cannot read property 'length' of null

Does it happens to anyone else?

I'm getting this error since the last update...


Best regards,

Jorge Moreira


Community Support
Community Support

Hi jmoreira_myp,


Which browser are you using? Please try to clear the browser cache and login with InPrivate mode to see if it will work.


I have seen a similar issue on another thread, @AndyPennell has made some suggestions on this issue, please also try if the suggestions will work for you. The thread link is:


I will also keep an eye on the similar thread in case there are any updates on this issue.

Best regards,
Mabel Mao

Community Support Team _ Mabel Mao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Hi @v-yamao-msft,


I just tried your suggestions but nothing worked...

I also saw the thread but that's not my case! As @AndyPennell said, the problem is having a form inside a Gallery, and I've nothing with that... I have this error while performing screen order (the only pattern I discovered 'till now).

Any other suggestion?


Best regards,

Jorge Moreira

Helpful resources

PA_User Group Leader_768x460.jpg

Manage your user group events

Check out the News & Announcements to learn more.

Community Connections 768x460.jpg

Community & How To Videos

Check out the new Power Platform Community Connections gallery!

Welcome Super Users.jpg

Super User Season 2

Congratulations, the new Super User Season 2 for 2021 has started!

Carousel 2021 Release Wave 2 Plan 768x460.jpg

2021 Release Wave 2 Plan

Power Platform release plan for the 2021 release wave 2 describes all new features releasing from October 2021 through March 2022.

Top Solution Authors
Top Kudoed Authors
Users online (1,060)