Copy and select function doesn't work

I want to convert a pdf to an exe-file. I used the built in HTML viewer and set no security profiles.

When I start the exe file, the copy and select functions doesn’t work. The two functions stay in “gray”

Can somebody help me. Thanks for an answer.

“Select All” is not available, however, Copy works, but you must first select text to copy with the appropriate button “text selection”: