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    Nintex Knowledge Base

    Error "Could not authenticate with SharePoint. ... If the problem persists, make sure Nintex Forms Online is installed properly"

    Summary
    When accesing Nintex Forms, the following error occurs: Could not authenticate with SharePoint. Please close the browser and try again. If the problem persists, make sure Nintex Forms Online is installed properly.

    Solution
    Edit the Item-level security to allow user accounts access to create/edit items.