I am running Omeka 2.1.1 locally on my Mac using XAMPP. I tried upgrading to Exhibit Builder 3, and now I get this error:
Omeka has encountered an error
Zend_Acl_Exception
Resource id 'ExhibitBuilder_Exhibits' already exists in the ACL
#0 /Applications/XAMPP/xamppfiles/htdocs/omeka/plugins/ExhibitBuilder/functions.php(237): Zend_Acl->addResource('ExhibitBuilder_...')
#1 [internal function]: exhibit_builder_define_acl(Array)
#2 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Omeka/Plugin/Broker.php(157): call_user_func('exhibit_builder...', Array)
#3 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Omeka/Application/Resource/Acl.php(33): Omeka_Plugin_Broker->callHook('define_acl', Array)
#4 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(683): Omeka_Application_Resource_Acl->init()
#5 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(629): Zend_Application_Bootstrap_BootstrapAbstract->_executeResource('Acl')
#6 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(586): Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap('Acl')
#7 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Omeka/Application/Resource/Helpers.php(120): Zend_Application_Bootstrap_BootstrapAbstract->bootstrap('Acl')
#8 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Omeka/Application/Resource/Helpers.php(27): Omeka_Application_Resource_Helpers->_initAclHelper()
#9 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(683): Omeka_Application_Resource_Helpers->init()
#10 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(629): Zend_Application_Bootstrap_BootstrapAbstract->_executeResource('Helpers')
#11 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(586): Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap('Helpers')
#12 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Omeka/Application/Resource/Frontcontroller.php(63): Zend_Application_Bootstrap_BootstrapAbstract->bootstrap('Helpers')
#13 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(683): Omeka_Application_Resource_Frontcontroller->init()
#14 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(626): Zend_Application_Bootstrap_BootstrapAbstract->_executeResource('frontcontroller')
#15 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application/Bootstrap/BootstrapAbstract.php(586): Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap(NULL)
#16 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Zend/Application.php(355): Zend_Application_Bootstrap_BootstrapAbstract->bootstrap(NULL)
#17 /Applications/XAMPP/xamppfiles/htdocs/omeka/application/libraries/Omeka/Application.php(51): Zend_Application->bootstrap()
#18 /Applications/XAMPP/xamppfiles/htdocs/omeka/admin/index.php(28): Omeka_Application->initialize()
#19 {main}
I am stuck; I don't know how to recover from this error. This is the screen I see when I try to access the omeka site.