Title: ERROR: Unknown admin page: on
Last modified: October 12, 2021

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# ERROR: Unknown admin page: on

 *  Resolved [marceljur](https://wordpress.org/support/users/marceljur/)
 * (@marceljur)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/error-unknown-admin-page-on/)
 * Have a nice day
    I have been using cerber security – free version for about 3
   months without any problems. Since I was very satisfied with the plugin – I was
   thinking about buying a yearly license. This morning 12.10.2021 I log in to the
   admin section of my website and if I click on wb cerber in the menu – it does
   not load any data from wp cerber.. ERROR: Unknown admin page: on your website
   I am sending a screen shot. I would like to continue using wp cerber and switch
   to a paid license.. Would you have any idea how to solve the situation … I tried
   reinstalling wp cerber – unfortunately it didn’t help… I also use WP hide login
   plugin and after deactivating it – again the same result – wp cerber does not
   load… I note that over 3 months of running there were absolutely no problems 
   and WP cerber worked great !!!!!! Thank you for any advice Regards
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-unknown-admin-page-on%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [webitman](https://wordpress.org/support/users/webitman/)
 * (@webitman)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/error-unknown-admin-page-on/#post-14960989)
 * I have the same issue as of this morning 12 oct at several of my sites.
 *  [webitman](https://wordpress.org/support/users/webitman/)
 * (@webitman)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/error-unknown-admin-page-on/#post-14965015)
 * This morning the error has gone, but don’t known why the problem existe and why
   it has gone.
    [@marceljur](https://wordpress.org/support/users/marceljur/)
 *  Thread Starter [marceljur](https://wordpress.org/support/users/marceljur/)
 * (@marceljur)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/error-unknown-admin-page-on/#post-14965054)
 * Have a nice day [@webitman](https://wordpress.org/support/users/webitman/)
    I
   just checked my admin section and I can confirm that the error disappeared for
   me and all data in Cerber Traffic inspector is displayed… I think it was related
   to some upgrade of some modules on Cerber Traffic server, but it’s hard to say
   🙂
 *  Plugin Author [gioni](https://wordpress.org/support/users/gioni/)
 * (@gioni)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/error-unknown-admin-page-on/#post-14966836)
 * Hi! Something interferes with WP Cerber. It can be either a user-related (role-
   related) plugin or a plugin that manages the WordPress admin menu.
 * Go to the “Main Settings” and ensure that the “Load security engine” setting 
   is set to “Standard mode”. This should help to avoid plugin conflicts.
 *  Thread Starter [marceljur](https://wordpress.org/support/users/marceljur/)
 * (@marceljur)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/error-unknown-admin-page-on/#post-14966946)
 * Have a nice day Gregory
    Thank you very much for your reply and for the tip 🙂
   If the error happens next time I will try to disable user related role plugins
   or admin menu plugins.. Thanks again have a nice day

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘ERROR: Unknown admin page: on’ is closed to new replies.

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 * 5 replies
 * 3 participants
 * Last reply from: [marceljur](https://wordpress.org/support/users/marceljur/)
 * Last activity: [4 years, 8 months ago](https://wordpress.org/support/topic/error-unknown-admin-page-on/#post-14966946)
 * Status: resolved