Title: Something is broken
Last modified: May 21, 2026

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# Something is broken

 *  Resolved [Martin Sauter](https://wordpress.org/support/users/martinsauter/)
 * (@martinsauter)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/something-is-broken-3/)
 * Recently, I have experienced two different problems on two different sites, and
   both problems are obviously caused by Admin Menu Tree Page View v2.8.9, since
   deactivating the plugin solved the problems:
 * On one site which uses [http://www.mapsmarker.com](http://www.mapsmarker.com),
   all maps were gone.
 * On another site which uses bricksbuilder.io, I was no longer able to safe changes
   that I made in the builder.

Viewing 6 replies - 1 through 6 (of 6 total)

 *  Thread Starter [Martin Sauter](https://wordpress.org/support/users/martinsauter/)
 * (@martinsauter)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/something-is-broken-3/#post-18914547)
 * On a third website, I could no longer log in – all I got were warnings like:
 * `Warning: Cannot modify header information - headers already sent by (output 
   started at /var/www/vhosts/example.com/httpdocs/example.com/wp-content/plugins/
   admin-menu-tree-page-view/index.php:1) in /var/www/vhosts/example.com/httpdocs/
   example.com/wp-login.php on line 515`
 *  [netzmaedchen](https://wordpress.org/support/users/netzmaedchen/)
 * (@netzmaedchen)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/something-is-broken-3/#post-18914602)
 * Same here! I can confirm what [@martinsauter](https://wordpress.org/support/users/martinsauter/)
   says. There is a problem in the new version!
 *  [CDHeumann](https://wordpress.org/support/users/cdheumann/)
 * (@cdheumann)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/something-is-broken-3/#post-18914859)
 * Same here.
 *  Plugin Author [Ciprian Popescu](https://wordpress.org/support/users/butterflymedia/)
 * (@butterflymedia)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/something-is-broken-3/#post-18914902)
 * Thanks for reporting this!
 * I am investigating.
 *  Plugin Author [Ciprian Popescu](https://wordpress.org/support/users/butterflymedia/)
 * (@butterflymedia)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/something-is-broken-3/#post-18914953)
 * It’s fixed in `2.8.10`.
 * Apparently, my editor introduced a BOM encoding character.
 *  Thread Starter [Martin Sauter](https://wordpress.org/support/users/martinsauter/)
 * (@martinsauter)
 * [3 weeks, 4 days ago](https://wordpress.org/support/topic/something-is-broken-3/#post-18915548)
 * Looks good. Thank you!

Viewing 6 replies - 1 through 6 (of 6 total)

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 * ![](https://ps.w.org/admin-menu-tree-page-view/assets/icon-256x256.png?rev=2984432)
 * [Admin Menu Tree Page View](https://wordpress.org/plugins/admin-menu-tree-page-view/)
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 * 6 replies
 * 4 participants
 * Last reply from: [Martin Sauter](https://wordpress.org/support/users/martinsauter/)
 * Last activity: [3 weeks, 4 days ago](https://wordpress.org/support/topic/something-is-broken-3/#post-18915548)
 * Status: resolved