[Plugin: GWPG3] WPG3 – white page

looking forward to a functional WP-G3 integration. Would help but my php skills are rusty. set up went fine until i tried to set the URL and the thumbnail sizes in the plugin configuration. After submitting, resulted in total WP admin whitepage. Had to delete/change name of plugin to restore normal function. must have changed something in the dbase, but haven’t found it on quick digging. . .