cannot verify or add vendor in admin get a blank page

[bobbrown1967]

the error log I get is

2015-08-08T16:22:19+00:00 ERR (3): exception 'Mage_Core_Exception' with message 'Invalid block type: Openwriter_Cartmart_Block_Adminhtml_Vendor_Edit_Tabs' in /home/xxxxxx/public_html/xxxxxxxx.com/app/Mage.php:595 Stack trace: #0 /home/xxxxxx/public_html/xxxxxx.com/app/code/core/Mage/Core/Model/Layout.php(495): Mage::throwException('Invalid block t...') #1 /home/xxxxxx/public_html/xxxxxx.com/app/code/core/Mage/Core/Model/Layout.php(437): Mage_Core_Model_Layout->_getBlockInstance('cartmart/adminh...', Array) #2 /home/xxxxxx/public_html/xxxxxx.com/app/code/community/Openwriter/Cartmart/controllers/Adminhtml/VendorController.php(53): Mage_Core_Model_Layout->createBlock('cartmart/adminh...') #3 /home/xxxxxx/public_html/xxxxxx.com/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Openwriter_Cartmart_Adminhtml_VendorController->editAction() #4 /home/xxxxxx/public_html/xxxxxx.com/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('edit') #5 /home/xxxxxx/public_html/xxxxxx.com/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) #6 /home/xxxxxx/public_html/xxxxxx.com/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch() #7 /home/xxxxxx/public_html/xxxxxx.com/app/Mage.php(684): Mage_Core_Model_App->run(Array) #8 /home/xxxxxx/public_html/xxxxxx.com/index.php(83): Mage::run('', 'store') #9 {main}

[shazadmaved]

Did you get a solution for this?

[albertobraschi]

Hi; fresh install, magento CE, 1.9.2.3, when logged as vendor in the following pages: orders, transations, reviews. what can it be? maybe ACL?

https://gyazo.com/a75e38248d88c25c122b39ec2b3bf714

[rahulplague]

@albertobraschi Add this function in orders, transations, reviews controllers. protected function _isAllowed() { return true; }