Title: Javascript error : Uncaught TypeError: Cannot read property ‘interval’
Last modified: August 16, 2020

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# Javascript error : Uncaught TypeError: Cannot read property ‘interval’

 *  Resolved [dungeonsanddoodles](https://wordpress.org/support/users/dungeonsanddoodles/)
 * (@dungeonsanddoodles)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/)
 * Javascript error : Uncaught TypeError: Cannot read property ‘interval’ of undefined
 * This error appears on the main Media Library Folders screen before the folders
   can load. I have already tried the reset but this has not solved it. I have also
   re/deactivated many plugins to try and sort this problem.

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

 *  Plugin Author [AlanP57](https://wordpress.org/support/users/alanp57/)
 * (@alanp57)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/#post-13267855)
 * If you using WordPress 5.5 this issue could be caused by the absence of the jquery-
   migrate plugin which is no longer loaded by default in the new version of WordPress.
   You can test the by installing the [Enable jQuery Migrate Helper plugin](https://wordpress.org/plugins/enable-jquery-migrate-helper/).
   If that resolves the issue, then I can add the code to load the missing jQuery
   plugin to Media Library Folders.
 *  [pkolenbr](https://wordpress.org/support/users/pkolenbr/)
 * (@pkolenbr)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/#post-13272542)
 * Yes, the Enable JQuery Migrate Helper plugin resolves the issue. Would appreciate
   if you can add the missing code to the Media Library Folders.
 *  Plugin Author [AlanP57](https://wordpress.org/support/users/alanp57/)
 * (@alanp57)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/#post-13274225)
 * Yes, JQuery Migrate is now included in version 6.0.2.
 *  [colinyon](https://wordpress.org/support/users/colinyon/)
 * (@colinyon)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/#post-13517605)
 * Hi, I am using WordPress 5.5.1.and Media Library Folders version is 6.0.3
 * I have followed your reset method and installed Enable JQuery Migrate Helper 
   plugin but I still get the same error.
 * Javascript error : Uncaught ReferenceError: commonL10n is not defined
 * Javascript error : Uncaught TypeError: Cannot read property ‘interval’ of undefined
 * Please help. thank you.
    -  This reply was modified 5 years, 8 months ago by [colinyon](https://wordpress.org/support/users/colinyon/).
 *  [Peter Smits](https://wordpress.org/support/users/psmits1567/)
 * (@psmits1567)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/#post-13517621)
 * Hi can you do the following please
 * attempt to disable all plugins, and use one of the default (Twenty*) themes. 
   If the problem goes away, enable them one by one to identify the source of your
   troubles.
 * Maybe the problem is caused by your theme or other plugin
 *  Plugin Author [AlanP57](https://wordpress.org/support/users/alanp57/)
 * (@alanp57)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/#post-13517816)
 * Also, there is a limit to the number of folders that the browser can handle, 
   somewhere above 900 folders. You can find out how many folders your media library
   has by checking the View Folder Data page in the reset plugin.

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

The topic ‘Javascript error : Uncaught TypeError: Cannot read property ‘interval’’
is closed to new replies.

 * ![](https://ps.w.org/media-library-plus/assets/icon-128x128.jpg?rev=1814048)
 * [Media Library Folders](https://wordpress.org/plugins/media-library-plus/)
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 * 6 replies
 * 5 participants
 * Last reply from: [AlanP57](https://wordpress.org/support/users/alanp57/)
 * Last activity: [5 years, 8 months ago](https://wordpress.org/support/topic/javascript-error-uncaught-typeerror-cannot-read-property-interval/#post-13517816)
 * Status: resolved