Bunch of errors after installing - undefined index, variable, invalid argument etc

Notice: Trying to get property of non-object in droogle_show_docs() (line 187 of /home/groups/public_html/sites/all/modules/Droogle/droogle.module).
Notice: Trying to get property of non-object in droogle_show_docs() (line 188 of /home/groups/public_html/sites/all/modules/Droogle/droogle.module).
Notice: Undefined index: subfolders in theme_droogle_print_folders() (line 466 of /home/groups/public_html/sites/all/modules/Droogle/droogle.module).
Notice: Undefined variable: domain in theme_droogle_list_docs() (line 652 of /home/groups/public_html/sites/all/modules/Droogle/droogle.module).
Notice: Undefined index: subfolders in _droogle_print_folders() (line 587 of /home/groups/public_html/sites/all/modules/Droogle/droogle.module).
Warning: Invalid argument supplied for foreach() in _droogle_print_folders() (line 587 of /home/groups/public_html/sites/all/modules/Droogle/droogle.module).
Notice: Undefined variable: domain in theme_droogle_list_docs() (line 652 of /home/groups/public_html/sites/all/modules/Droogle/droogle.module).

Besides these error messages, the block does show the Google drive files and folders, and upload is possible.
however, pages take ages to load (probably because of the errors) and when I click on a docs file in the block, i get a Google apps page with the message

"Server error - Sorry, you've reached a login page for a domain that isn't using Google Apps. Please check the web address and try again"

..although i thought that droogle does not require an apps account.

clicking on a filder in the droogle block, opens up a browser window with google docs folder. Would have been nice to keep people inside the Drupal site without being moved away to a separate google docs browser page.