MOD Note: Changed title.
Warning: If you do not provide more information in your next post, I will delete your topic.
It is only a limitation related to APK files, currently I only found a different browser solving this.
I cant download from the google app store also. It start to download, but never ends.
This is indeed strange, I guess you used the Google Installer to install the Play Store.
What usually helps is to clear its data.