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I am New to wordpress After installing and activating a plugin I got the following error

( ! ) Fatal error: Cannot declare class WP_Importer, because the name is already in use in C:\wamp2\www\wordpress\wp-admin\includes\class-wp-importer.php on line 5

Please help me, how to fix this error...

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    You have another plugin/theme adding the WP_Importer class. Did you install any recent plugin/theme that broke the website? – Cornel Raiu Feb 22 '20 at 10:35
  • or are you trying to include the class file anywhere without using require_once or include_once ? – Cornel Raiu Feb 22 '20 at 10:36
  • Yes I installed a plugin and after activating it that what happened – user183165 Feb 22 '20 at 10:38
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    go in the wp-content/plugins folder and change/delete the folder of the plugin you installed. It will work again after that. You should also open a ticket with the plugin developer and describe the problem. – Cornel Raiu Feb 22 '20 at 11:35
  • Many thanks to you sir... It worked ... thank you soooooo much – user183165 Feb 22 '20 at 12:08
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You have another plugin/theme adding the WP_Importer class. Did you install any recent plugin/theme that broke the website?

If you did install a plugin that broke the website go in the wp-content/plugins folder and change/delete the folder of the plugin you installed. It will work again after that.

You should also open a ticket with the plugin developer and describe the problem.

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