web
You’re offline. This is a read only version of the page.
close
Skip to main content

Announcements

News and Announcements icon
Community site session details

Community site session details

Session Id :
Power Platform Community / Forums / Power Apps / Sharepoint Access Erro...
Power Apps
Unanswered

Sharepoint Access Error on Powerapp Startup

(0) ShareShare
ReportReport
Posted on by

Hello Community, 

 

I have been experiencing a reoccurring error when I first open my Power App (which pulls data currently from a list in Sharepoint). The user images do not properly show within the gallery, and include a small green icon in the top left corner indicating that there is a disconnect to the Sharepoint list. The application uses a gallery/collection to display data filtered for Today. The error I experience when attempting to open Sharepoint is:

Bad Request - Header Field Too Long


HTTP Error 400. A request header field is too long.

 

My current work around is to reopen a new window (Chrome) and to clear the browsing history. If anyone has suggestions as to why there seems to be a disconnect between the Sharepoint and Power App upon first startup, that would be helpful.  Thanks 

 

@SharePoint 

Categories:
I have the same question (0)

Under review

Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.

Helpful resources

Quick Links

Introducing the 2026 Season 1 community Super Users

Congratulations to our 2026 Super Users!

Kudos to our 2025 Community Spotlight Honorees

Congratulations to our 2025 community superstars!

Congratulations to the March Top 10 Community Leaders!

These are the community rock stars!

Leaderboard > Power Apps

#1
Vish WR Profile Picture

Vish WR 762

#2
11manish Profile Picture

11manish 640

#3
Valantis Profile Picture

Valantis 548

Last 30 days Overall leaderboard