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Problem with Timepicker addon in Edit Event page

Posted: January 11, 2018 at 9:27 am


January 11, 2018 at 9:27 am


I have a problem with the Edit Event page (link like : wordpress/wp-admin/admin.php?page=espresso_events&action=edit&post=1304).
When I try to open a ticket detail via gear icon the detail row doesn’t open and the console show these errors.

Uncaught TypeError: Cannot set property 'parseDateTime' of undefined
    at jquery-ui-timepicker-addon.js:904
    at jquery-ui-timepicker-addon.js:1530
(anonymous) @ jquery-ui-timepicker-addon.js:904
(anonymous) @ jquery-ui-timepicker-addon.js:1530

Uncaught TypeError: a(...).sortable is not a function
    at Object.init (postbox.min.js:1)
    at Object.add_postbox_toggles (postbox.min.js:1)
    at HTMLDocument.<anonymous> (post.min.js:1)
    at j (jquery.js:2)
    at Object.fireWith [as resolveWith] (jquery.js:2)
    at Function.ready (jquery.js:2)
    at HTMLDocument.J (jquery.js:2)
init @ postbox.min.js:1
add_postbox_toggles @ postbox.min.js:1
(anonymous) @ post.min.js:1
j @ jquery.js:2
fireWith @ jquery.js:2
ready @ jquery.js:2
J @ jquery.js:2

I have to mention that we have moved the site in another dedicated server, but it has the same hardware and configuration or I hope it at least.
I spent a lot of time to find a solution and then I am here. Do you have any ideas to how solve the issue? Some php library are missing?
Thanks in advance,


  • Support Staff

January 11, 2018 at 12:41 pm

Hi Simone,

Usually that type of issue is the result of a plugin or theme conflict. Here’s a link to some information on how to troubleshoot that:


January 12, 2018 at 4:46 am

Dear Josh,

thanks for help.
Thanks to your linked guide I was able to sort out the issue.



  • Support Staff

January 12, 2018 at 7:47 am

Hi Simone,

Can you provide any details on the cause?

If it’s a plugin conflict we can add the plugin to our known conflicts list.


January 12, 2018 at 8:03 am

Dear Tony,

it was a plugin conflict about Paid Membership pro Plugin, version:
It was strongly customised by a colleague, so I think you can get any useful information about it.

I tried to disable all plugin and activated one by one but it didn’t sort the issue. Strangely, if I enabled the Paid Membership Plugin as last, everything works.
Unfortunately, I couldn’t spend a lot of time to investigate.

Sorry if it don’t help,

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