Google native documents are direct outcome of files created from Google workspace applications. This includes Google Docs, Google Slides, Google Sheets etc.

Non-native documents are equivalent documents from platforms other than Google, like Microsoft, Zoho, Open Office etc. This includes doc, docx, pdf, ppt, pptx, xls, xlsx, odt, etc.

When FIles are used with Form Builder or its variant are non-native such PDF, DOCX, ODT, PPT, PPTX. Form Builder not able to access these files and show an error notification to user "Form Builder Plus could not process your request due to error in accessing the document."

Solution: Users need to convert these non-native documents to Google Native documents to access these files' data in Form Builder and its variant.

Update: Form Builder Plus for Google Drive now supports non-native files from Google Drive add-on.

Step1: Upload the file to Google Drive. In your case the file is already in Google Drive.

1. Open your browser and go to Google Drive by typing drive.google.com in the location bar.

2. On the top left of the Google Drive screen, click on New and then navigate to File Upload from the drop-down menu.

Step2: Open the file with respective Google App. i.e .DOCX file with Google Docs or .XLS with Google Sheet.

Step3: Go to menu "FILE" and click on save as Google "files" i.e Google Docs, Google Sheet.

Step5: open new generated Files. Now user able to access these files with Form Builder Plus.