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Failed to open Magento admin page

I have installed the following extension.

http://www.magentocommerce.com/magento-connect/kancart-mobile-web-mobile-app-108-themes-in-1-freemium-mobile-web-mobile-app-service.html

But I came to not enter the dashboard page (admin page won't open). It shows the following error:

An error occurred while processing your request. Print exclusion is disabled by default for security reasons.

The error log entry number is 731249982844.

So, I checked the reports directory.

a: 5: {i: 0; s: 75: "Mage registry key" _singleton / Kancart_MobileApi_Helper_Data "already exists"; i: 1; s: 1533: "# 0

I appreciate any help. Thank.

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2 answers


This method helped me solve this problem. I'm not sure if this is correct or not. But try it.



Loading only the admin page. But your site will load. Add / upload to base url in browser. You will be redirected to Magento Connect Manager. Log in and register. And logout. Delete the maintenance.flag file in the main magento folder. Now try logging into your admin panel.

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try to disable the Kancart_MobileApi module and check it.



if works then check config.xml module and recognize any observer and find singleton replace with model

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