Unable to deploy InfoPath Admin Approved Template to CA in SharePoint 2019

Question

Hi Team,

I am working in SharePoint 2019 migration project. I am in the position to migrate InfoPath 2007 form to SharePoint 2019. The InfoPath 2007 form was developed with managed code (c#) and deployed as an admin-approved template. In 2007, the forms were deployed in Central Admin and uploaded to FormServerTemplates library.

I made the following approach to migrate the InfoPath form, but the converted forms are not deployed to the Central Admin in SharePoint 2019.

• Open the InfoPath 2007 form template in InfoPath 2013
• Export Source Files to the folder
• Updated the site collection URL in the manifest.xsf file from the extracted folder
• Downloaded all UDCX Files from SharePoint 2007 Data Connections library and updated WebUrl & ListId (GUID)
• Uploaded the updated UDCX files into SharePoint 2019 Data Connections library
• Opened the command prompt and navigated to the extracted source files folder
• Ran the command "dir /a-d /b > ../cabfiles.txt"
• Updated the cabfiles.txt file like below

• Ran the command "makecab.exe /f cabfiles.txt". It is generated the XSN file in the specified path which is mentioned in the cabfiles.txt file.
• Open the generated xsn file in design mode. Verified the data connection and it is pointed to the new site (SP 2019)
• Set the Full Trust under Security and Trust in Form Options
• Set Compatability as Web Browser Form (Initially, Web Browser Form (InfoPath 2007))
• Publish the form
• Selected the target site
• Checked Enable this form to be filled out by using a browser checkbox.
• Selected Administrator-approved form template (advanced) option button
• Choose the local path to save the template.

Created SharePoint 2019 Empty Project in Visual Studio 2019 and did the following.

• Added Feature in the existing Feature folder
• Added Module as a new item into the project
• Delete the Sample.txt file
• Added the published xsn file and dll (InfoPath code behind dll) file into the module folder
• Updated the Elements.xml file as below

• Updated the Feature.xml file as below

• Generated the WSP and deployed to the site and activated the Feature
• XSN file is uploaded to the FormServerTemplates library, but it is not uploaded to the Central Admin
• When I try to open the xsn file from FormServerTemplates, it throws an error as "This form cannot be opened in a Web browser. To open this form, use Microsoft InfoPath".

Please provide the solution to overcome these errors and open the admin approved InfoPath template in SharePoint 2019.