PDF created in PDF24 cannot be opened in IPO IPAD or Iohine

I have used PDF24 for several years to create PDF's in Windows 10

These PDF work  perfectly on Windows 10

Recently I have connect my Windows drive to my IPAD and want to display PDFs

All have failed with various error message but not a reason

some Error messages are: corrupted PDF - Import failed - etc

Is there a solution to the incompatibilty of PDF24 with IOS

THANKS FOR THE ASSISTANCE....