Forum Discussion

MeaganUTSW's avatar
MeaganUTSW
Copper Contributor
Jan 21, 2026

Intermittent failures when creating new libraries in modern SharePoint

Hi everyone,

I’m seeing an issue in our modern SharePoint Online site collection where creating new document libraries has started failing. This site has worked normally for years, but over the past week, most library creation attempts haven't worked. 

1) The page briefly flashes or glitches during the creation process. 

and

2) A non‑ending spinning wheel when I hit "create"

or

3) Creation attempts return “Something's not right.” error page. 

The failures happen across all subsites, in multiple browsers, and I’m a Site Collection Administrator. No permission changes were made recently.

Has anyone seen similar intermittent library creation failures in a modern site collection, or know what might cause this kind of inconsistent behavior? Any guidance would be appreciated.

Thanks!
Meagan 

 

Document Library
SharePoint Online
Sites

6 Replies

  • SofieRoss's avatar
    SofieRoss
    Copper Contributor
    Feb 03, 2026

    Hi Meagan, just to say I was having the same issue, and I think it might be a Chrome thing! It happens in the modern sharepoint interface when I go to give the list (whether a new blank or a template) a name, and the frames just glitched out like crazy! But when I followed the process in Firefox it seemed totally fine. Hope that helps a bit!

    • nsbrown2020's avatar
      nsbrown2020
      Copper Contributor
      Feb 10, 2026

      We're getting the same thing, in Edge, eventually it 'may' work.

      We were wondering if it was our Palo Alto FW blocking something, but can't see anything.

      • nsbrown2020's avatar
        nsbrown2020
        Copper Contributor
        Feb 10, 2026

        Actually looking at it with Developer Tools on, you can see 4000 failed calls to the Sensitivity.js trying to load the labels I imagine. This is then causing a SP throttle..

  • MeaganUTSW's avatar
    MeaganUTSW
    Copper Contributor
    Jan 22, 2026

    Hi Dave, 

    Thanks for your reply. I have tried creating a new library from the Site Contents page and directly on the site using the New dropdown. Neither method works. The throttling message is confusing for me as well because I’m not doing anything different from what I’ve done many times before, and I’m only making a single library creation request at a time.

    I am wondering if it is a backend SharePoint Online provisioning issue? But I am a little out of my depth.

    • DaveMehr365's avatar
      DaveMehr365
      MVP
      Jan 22, 2026

      Hi MeaganUTSW​ 

      have you tried this on site level or only in subwebs?

      And have you created a new site and created new libraries, does it works?

       

      Best, Dave

  • DaveMehr365's avatar
    DaveMehr365
    MVP
    Jan 22, 2026

    Hi MeaganUTSW​ 

    How do you create new libraries?

    Throttling (in your url) usually occurs when you make too many requests in too short a time...

     

    Best, Dave