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I am getting the following error:

Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Core.IRibbonUI.'

The OnePlaceMail Outlook add-in encountered an unexpected issue.

Error: Unable to cast COM object of type 'System.ComObject' to interface type 'Microsoft.Office.Core.IRibbonUI'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000C03A7-0000-0000-C000-000000000046}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPEELIBNOTREGISTERED)).

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Uche shared this idea  ·   ·  Report…  ·  Admin →
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  • AdminSupport (Admin, OnePlace Solutions) commented  ·   ·  Report

    Hi Uche,

    Thanks for your comment.

    The root issue of this error is that the Office version reference for a key in the registry is pointing to an incorrect value.

    I have emailed you the instructions to resolve this issue.

    - Dylan

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