Failed to connect to server. Error: 0x80070005 when I try to upload an excel file to an IIS server

Hello,

I have been trying to upload an excel file to my IIS site but I had this problem first:

The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID 
{00024500-0000-0000-C000-000000000046}
 and APPID 
Unavailable
 to the user IIS APPPOOL\DefaultAppPool SID (S-1-5-82-3006700770-424185619-1745488364-794895919-4004696415) from address LocalHost (Using LRPC) running in the application container Unavailable SID (Unavailable). This security permission can be modified using the Component Services administrative tool.

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I could do a little research and execute the following command:
mmc comexp.msc /32

I was able to add the IIS APPPOOL\DefaultAppPool  user to the DCOM configuration  but now I have another error code:

Failed to connect to server. Error: 0x80070005

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="MsiInstaller" /> 
  <EventID Qualifiers="0">1015</EventID> 
  <Level>3</Level> 
  <Task>0</Task> 
  <Keywords>0x80000000000000</Keywords> 
  <TimeCreated SystemTime="2018-09-03T04:49:57.000000000Z" /> 
  <EventRecordID>319105</EventRecordID> 
  <Channel>Application</Channel> 
  <Computer>AU3.contoso.com</Computer> 
  <Security UserID="S-1-5-82-3006700770-424185619-1745488364-794895919-4004696415" /> 
  </System>
- <EventData>
  <Data>0x80070005</Data> 
  <Data>(NULL)</Data> 
  <Data>(NULL)</Data> 
  <Data>(NULL)</Data> 
  <Data>(NULL)</Data> 
  <Data>(NULL)</Data> 
  <Data /> 
  </EventData>
  </Event>

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Could you help me determine what other procedures I should do?

Thanks!
JN