Can you please check your database structure?
In raidplanner_guild table there should be a sync_plugin column. If it’s not there you have to run the following sql commands in you database:
ALTER TABLE `jos_raidplanner_guild` DROP `guild_level`, DROP `guild_region`;
ALTER TABLE `jos_raidplanner_guild` CHANGE `guild_realm` `sync_plugin` VARCHAR( 80 ) NOT NULL DEFAULT ”;
(the above sql command are valid if you table prefix is jos_ in other cases please replace it with your table prefix)
Please post the result to let me fix it asap.