Since I updated Woocommerce 3.8.0, the wordpress admin side had presented lots of pb :
– not any dropdown in admin menu
– impossible to drag and drop elements on dashboard
– some buttons in the admin do not work anymore
I searched a lot why.
The only way to make it work again was to deactivate WooCommerce Birthday Discount Vouchers plugin.
I have the same problem on different websites.
On chrome, on console tab, i have 2 issues :
Uncaught TypeError: $(…).select2 is not a function
at HTMLDocument.<anonymous> (index.php:2593)
at i (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,underscore&ver=5.3.2:2)
at Object.fireWith [as resolveWith] (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,underscore&ver=5.3.2:2)
at Function.ready (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,underscore&ver=5.3.2:2)
at HTMLDocument.J (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,underscore&ver=5.3.2:2)
jquery.flot.resize.min.js?ver=3.8.1:1 Uncaught TypeError: Cannot set property ‘w’ of undefined
at n (jquery.flot.resize.min.js?ver=3.8.1:1)
at dispatch (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,underscore&ver=5.3.2:3)
at r.handle (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,underscore&ver=5.3.2:3)
screenshot:
https://prntscr.com/qkjwh0