Troubled in downloading PDF file set in screen color reader RGB.
If this issue happens to all PDF documents then another possible cause is the pdf cached memory. It’s been observed that when cached memory is full it forces the pdf software to crash. Try to empty the cached memory: (steps below)
If this won’t work then you may try to uninstall and reinstall the software. If after reinstalling you’re still stuck with the same issue then you might consider using other pdf readers. Play store have varieties of these and mostly free. Hope this helps!
Try to restart your android phone. If it still can’t read PDF files, you should download an application that can read PDF files on your android phone in play store. In case you don’t want to pay, you can check apkmania.com if there is an application that can read PDF files and all of the applications listed on that website are free.
If after installing PDF reader it still does not work, you can try to set the default PDF viewer to be your browser such as opera mini instead of the PDF viewer. This can work because the PDF viewer will act as a plugin to your browser.