Help "Package file invalid"

[TheRealMillah]

Everytime I try to download an app from the market it starts to download then it says "package file invalid". I've tried downloading several different apps & rebooted my phone twice. Any help?

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[bamaduc]

Go to the play store app though settings>apps>downloaded. Find google play store and wipe data, cache, and uninstall updates. You will have the old market the first time you reopen it, but it will automatically update itself the second or third time you reopen it. This should fix it, I was having the same issue and this is what fixed it.