Hello,
Please adjust the following settings in your php.ini and restart http server:
- display_errors set to On
- allow_url_fopen set to On
- load cURL extension (not necessary, but recommended)
- load ZipArchive extension
Next time you try to enter the store, it should work properly. If it doesn't, please post error message that will be displayed (Failure 500 is generic code for all server error messages, display_errors is necessary to see meaningful message).
Kind regards,
Arek