Fix WordPress Admin Pages Blank After Installing WooCommerce Plugin or Theme

The popular e-commerce plugin for WordPress, WooCommerce, though is a fork from another popular eCommerce plugin for WordPress Jigoshop, has quickly attracted its own followings and gained popularity. The ability of WooCommerce to transform the WordPress website into a full featured online eCommerce store while maintaining the WordPress’ hallmark for ease of use has set its apart from competition.

However, after installing WooCommerce plugin, or after activating a theme for WooCommerce, some webmasters get a rude shock that some or all of the WordPress admin pages no longer accessible. When attempting to visit WordPress admin dashboard, or when want to edit or post new post or page via edit.php and post-new.php, a blank page is displayed instead.
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