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Request attachment is unable to be viewed.Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 8000401a

What I have tried:

Request attachment is unable to be viewed.Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 8000401a 
Posted
Updated 8-Nov-20 23:07pm

The message is telling you that whatever class you are trying to instantiate is not registered on your system. Since you did not tell us what your code is trying to do so there is not much more that we can say.
 
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CLSID 00024500-0000-0000-C000-000000000046 refers to Microsoft Excel. The error means that Office is not installed on the computer where your code is running.

If this is an ASP.NET application, you should read the following Microsoft knowledgebase article:
Microsoft does not currently recommend, and does not support, Automation of Microsoft Office applications from any unattended, non-interactive client application or component (including ASP, ASP.NET, DCOM, and NT Services), because Office may exhibit unstable behavior and/or deadlock when Office is run in this environment.
 
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