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I installed the CU September 2020 (KB4484504 and KB4484505). After that, the command bar on libraries and lists and in the items grid are broken.

Command bar not visible

I created a new site in English language and there the command bar is visible. Is there any solution?

3 Answers 3

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This is a bug introduced with this CU. Looks like this only happens to localized webs. It is already listed as known issue: https://support.microsoft.com/en-us/help/4484505/security-update-for-sharepoint-server-2019-sept-8-2020

Workaround is to use classic mode at the moment.

As far as I heard, there are already some cases open for this behavior.

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I just posted about the august cu breaking oob menu functionality in SharePoint 2019.In the console I see js errors introduced after the updates. Checkout your chrome dev tools console and i bet you will see some awesome new errors courtesy of microsoft.

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  • No javascript error is detected by the chrome console. Only an error on ajax request is traced: "{siteUrl}/_api/SP.Directory.DirectorySession/User(principalName='{myDomain/myUsername}')?$select=sharePointLibrariesFirstRun,sharePointFiltersPaneFirstRun 500 (Internal Server Error)"
    – fbool
    Commented Sep 10, 2020 at 10:04
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Install KB 4484504. See the following documentation. This helped me resolve the missing command bar. https://support.microsoft.com/en-us/help/4461512/september-21-2020-update-for-sharepoint-server-2019-kb4461512

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  • I already installed it. It works! Thanks!
    – fbool
    Commented Oct 7, 2020 at 9:45

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