Help resolving database error

I'm a bit of an Omeka newbie, so I'm having trouble figuring out how to resolve a database error I'm receiving. Any help at all would be appreciated.

This is my site: http://materialtexts.org/vwwr/

No matter what I click, I get an error. This happened after the CSV import plugin was installed. Even after the plugin was uninstalled, the error kept occurring.

This is what is reported in the error.log file:

2014-05-27T14:43:09-05:00 ERR (3): exception 'Zend_Http_Client_Exception' with message 'Passed parameter is not a valid HTTP URI.' in /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Http/Client.php:311
Stack trace:
#0 /home/writings/public_html/materialtexts.org/vwwr/plugins/Scripto/libraries/Scripto/Service/MediaWiki.php(113): Zend_Http_Client->setUri(NULL)
#1 /home/writings/public_html/materialtexts.org/vwwr/plugins/Scripto/libraries/Scripto.php(77): Scripto_Service_MediaWiki->__construct(NULL, true)
#2 /home/writings/public_html/materialtexts.org/vwwr/plugins/Scripto/ScriptoPlugin.php(388): Scripto->__construct(Object(ScriptoAdapterOmeka), Array)
#3 /home/writings/public_html/materialtexts.org/vwwr/plugins/Scripto/ScriptoPlugin.php(304): ScriptoPlugin::getScripto()
#4 /home/writings/public_html/materialtexts.org/vwwr/plugins/Scripto/ScriptoPlugin.php(263): ScriptoPlugin->_appendToItemsShow()
#5 [internal function]: ScriptoPlugin->hookPublicAppendToItemsShow()
#6 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Omeka/Plugin/Broker.php(156): call_user_func_array(Array, Array)
#7 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Omeka/Plugin/Broker.php(182): Omeka_Plugin_Broker->callHook('public_append_t...', Array)
#8 [internal function]: Omeka_Plugin_Broker->__call('public_append_t...', Array)
#9 [internal function]: Omeka_Plugin_Broker->public_append_to_items_show()
#10 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/globals.php(215): call_user_func_array(Array, Array)
#11 [internal function]: fire_plugin_hook('public_append_t...')
#12 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/globals.php(234): call_user_func_array('fire_plugin_hoo...', Array)
#13 /home/writings/public_html/materialtexts.org/vwwr/application/helpers/PluginFunctions.php(92): get_plugin_hook_output('public_append_t...')
#14 /home/writings/public_html/materialtexts.org/vwwr/themes/rhythm/items/show.php(26): plugin_append_to_items_show()
#15 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Omeka/View.php(113): include('/home/writings/...')
#16 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/View/Abstract.php(888): Omeka_View->_run('/home/writings/...')
#17 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(900): Zend_View_Abstract->render('items/show.php')
#18 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(921): Zend_Controller_Action_Helper_ViewRenderer->renderScript('items/show.php', NULL)
#19 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(960): Zend_Controller_Action_Helper_ViewRenderer->render()
#20 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Controller/Action/HelperBroker.php(277): Zend_Controller_Action_Helper_ViewRenderer->postDispatch()
#21 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Controller/Action.php(527): Zend_Controller_Action_HelperBroker->notifyPostDispatch()
#22 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Controller/Dispatcher/Standard.php(295): Zend_Controller_Action->dispatch('showAction')
#23 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#24 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(97): Zend_Controller_Front->dispatch()
#25 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Zend/Application.php(366): Zend_Application_Bootstrap_Bootstrap->run()
#26 /home/writings/public_html/materialtexts.org/vwwr/application/libraries/Omeka/Core.php(165): Zend_Application->run()
#27 /home/writings/public_html/materialtexts.org/vwwr/index.php(28): Omeka_Core->run()
#28 {main}

I'm not sure how to even start resolving this problem. If anyone could help, I would appreciate it greatly. Thank you!

The error looks like it is going through Scripto -- any recent changes to that, or to the MediaWiki installation that Scripto uses?

I'm looking at MediaWiki, and I think there is probably a problem with that. I've got MediaWiki set up in /m, so the index page for that should appear here: http://materialtexts.org/vwwr/m/index.php

What is weird is that when I try to go to that index page, I'm being redirected here: http://materialtexts.org/vwwr/m/vwwr/m/index.php?title=Main_Page

An extra set of /vwwr/m/ is being added to the URL. Does anyone know what I need to edit to get the redirect fixed? Perhaps this is the first step in resolving the database error I'm receiving. Thanks!