Display problem


New member
I'm trying with SpotEditor 4.0 free to create the rotation on the Catalina operating system, and on Big Sur, at the end of the operation Safari opens with the html page and the rotation works normally, if instead I close the page and reopen the html with Safari from osx 10.9.5 it works fine, if I open it from Catalina os or da BigSur the file doesn't open.
The same display problem occurs if I open the html page from Windows OS.
Can someone help me?