PDF files created with X8 open blank

I have scoured this forum and the internet and not been able to find a solution to this problem.

I create a PDF and export it. I can open and view it no problem on my PC (Intel i7, Win10) but when I send it to other persons they open it and get a blank screen. File size is what you would expect for the PDF, it just opens blank.

I have the latest build of X8 and checked that the Regional settings are decimal point (.) as previously suggested.

Any help would be greatly appreciated.