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How to Fix Viva Engage Web Part Publisher Error in SharePoint

Maira Mehtab Sep 27, 2026 868 views

Question details

Users need to resolve a publisher error where the Viva Engage Conversations web part crashes.

Product: SharePoint / Viva Engage
Device & OS: not provided
Scenario: Publishing content by selecting Discussion, Question, Praise, or Poll within the Viva Engage web part on a SharePoint page.
Observed behavior: The web part throws a RangeError stating that the 'maximum call stack size has been exceeded'.

Before you start

Ensure you have access to a desktop web browser (like Chrome or Edge) to easily capture developer logs, as your IT administrator will need these to escalate the issue to Microsoft.

Solution 1Recommended

Capture Diagnostic Logs and Open a Microsoft Service Request

Since this RangeError is often caused by a defect in the web part's core code, the most effective solution is to gather error logs and have your administrator escalate it to Microsoft support.

The 'maximum call stack size exceeded' error usually indicates an infinite loop bug within the JavaScript running the Viva Engage web part. Standard page refreshes typically cannot bypass this bug.

Check the Service Health Dashboard

Log into your Microsoft 365 environment and check the Service health dashboard to see if Microsoft has already reported an ongoing incident related to Viva Engage or SharePoint web parts.

Open Browser Developer Tools

On the SharePoint page where the error occurs, press F12 on your keyboard to open your browser's Developer Tools, then navigate to the Network tab and check the 'Preserve log' option.

Reproduce the Web Part Error

Interact with the Viva Engage Conversations web part by selecting Discussion, Question, Praise, or Poll to trigger the RangeError.

Export HAR and Console Logs

Right-click the network activity grid and select 'Save all as HAR with content'. Next, navigate to the Console tab, right-click, and save the log output as a text file.

Contact Your Administrator

Provide the collected HAR and console logs to your organization's Microsoft 365 administrator, and request that they open a formal service request in the Microsoft 365 admin center for the development team to investigate.

Administrator Privileges Required: Only users with the Microsoft 365 Administrator role can submit a service request to the Microsoft backend support team.

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Frequently Asked Questions

What causes the 'maximum call stack size exceeded' error in SharePoint?

This is a standard JavaScript RangeError. It occurs when a function within the Viva Engage web part code endlessly calls itself (an infinite loop), exhausting the browser's allocated memory stack.

Can a site owner fix the Viva Engage RangeError directly?

Typically, no. Because the defect originates from Microsoft's underlying source code for the Viva Engage Conversations web part, it usually requires an official patch or rollback from the Microsoft development team.

How do I collect a HAR log in Microsoft Edge or Google Chrome?

Press F12 to open Developer Tools, click the Network tab, ensure 'Preserve log' is checked, and reproduce the error on your page. Afterward, right-click anywhere in the network events list and choose 'Save all as HAR with content'.

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