Error Reports are logged in the var/report folder

With this sort of error simply re-uploading will not work.

 To fix this setup scripts must be triggered. This can be done only by re-initializing the install process with Magento cache DISABLED.

 1. Disable any Magento cache.

 2. Login to your database;

 3. Execute:

     DELETE from `core_resources` WHERE code LIKE 'usimple%_setup';

 4. Enable cache.