We can't tell you what the issue is because we have no access to your package, the manifest, and your phone.
You can search the web for some hints:
Fix Parse Error - There is a Problem Parsing the Package - Technical Notes
You might also try to install the package on different phones (preferably including a Google model). If that fails too, the problem is presumably located in your package (manifest). If not try some of the suggestions from searching the web with your phone (clear the PlayStore cache, restart the phone, disable/uninstall antivirus and cleaner applications, reset the phone).