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

Welcome to the User Group Public Preview

Check out new user group experience and if you are a leader please create your group

MBAS Attendee Badge

Claim Your Badge & Digital Swag!

Check out how to claim yours today!


Demo Extravaganza is Back!

We are excited to announce that Demo Extravaganza for 2021 has started!

MBAS on Demand

Microsoft Business Applications Summit sessions

On-demand access to all the great content presented by the product teams and community members! #MSBizAppsSummit #CommunityRocks

Top Solution Authors
Top Kudoed Authors
Users online (22,271)