[wp-trac] [WordPress Trac] #50958: WP 5.5 trashes customizations made to site

[WordPress Trac]

#50958: WP 5.5 trashes customizations made to site
-------------------------------+------------------------------
 Reporter:  wpa2020            |       Owner:  (none)
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  Awaiting Review
Component:  Administration     |     Version:  5.5
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
-------------------------------+------------------------------
Changes (by desrosj):

 * keywords:   => reporter-feedback
 * component:  Customize => Administration
 * severity:  major => normal


Comment:

 Hi @wpa2020,

 Welcome to Trac!

 It's hard to tell from your description what "modifications" means, but
 any modifications made directly to WordPress Core, plugin, or theme files
 will be overwritten when they are updated with new versions. This is not
 the recommended way to make modifications to the behavior of WordPress.

 If that is not the case, could you try installing and activating this
 plugin: https://wordpress.org/plugins/enable-jquery-migrate-helper/.

 This will confirm that there is JavaScript on your site that needs to be
 updated to follow more modern jQuery practices. You can leave the plugin
 active for the time being, but the breaking code will need to be updated
 before the next step of the Upgrading jQuery in Core roadmap.

 If the plugin does fix your issue, then please reach out to the plugins
 and themes that contain the old code directly.

 Also, in the future, please use the WordPress.org support forums for
 requests like this instead.

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Ticket URL: <https://core.trac.wordpress.org/ticket/50958#comment:1>
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