Error "TypeError: Cannot read property 'trim' of undefined" when reading a topic in a discussion


  • Hi,

    I have created a discussion in Sharepoint online but it is impossible to read this discussion.

    When I click on the thread title I receive this error:

    TypeError: Cannot read property 'trim' of undefined

    I do not understand why.

    Do you have an idea?


    Wednesday, December 14, 2016 12:45 PM

All replies

  • Hi David,

    For this issue, please verify the things below:

    1. Does this issue occur with all the discussions? Please create a new discussion board list to see what happens.
    2. Does this issue occur with all the users? Please test with another user account to see what happens.

    Please also use Fiddler to track the requests to see if there are any errors returned.

    Best Regards,


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    Thursday, December 15, 2016 10:19 AM