I also have this problem and please don't say "Update" I just spent 4 hours getting your software to install and update on a 2.5 site. I am running the latest version of Gallery & Sprocket. Please advise.
The only way to get it to disappear is to disable Rokcommon plugin via PHPmyAdmin but then RokGallery and Sprocket won't work.
Here's the error:
Fatal error: Uncaught exception 'InvalidArgumentException' with message 'The parameter "roksprocket.providers.path" must be defined.' in /home/designby/public_html/libraries/rokcommon/RokCommon/Service/ContainerImpl.php:135 Stack trace: #0 /home/designby/public_html/libraries/rokcommon/RokCommon/Service/ContainerImpl.php(332): RokCommon_Service_ContainerImpl->getParameter('roksprocket.pro...') #1 /home/designby/public_html/plugins/system/roksprocket/roksprocket.php(172): RokCommon_Service_ContainerImpl->offsetGet('roksprocket.pro...') #2 /home/designby/public_html/plugins/system/roksprocket/roksprocket.php(89): plgSystemRokSprocket->loadProviders(Object(RokCommon_Service)) #3 [internal function]: plgSystemRokSprocket->onAfterInitialise() #4 /home/designby/public_html/libraries/joomla/event/event.php(71): call_user_func_array(Array, Array) #5 /home/designby/public_html/libraries/joomla/event/dispatcher.php(161): JEvent->update(Array) #6 /home/designby/public_html/libraries/joomla/application/application.php(642): JDispatch in /home/designby/public_html/libraries/rokcommon/RokCommon/Service/ContainerImpl.php on line 135