After updating WordPress from v3.5.1 to v3.8.1 I got that same pop-up.
I use that updater ( https://www.ads-software.com/plugins/jquery-updater/ ) and still getting the same pop up window saying BlockUI requieres jQuery v1.3
When I installed the updater I got a message saying that Twenty-Eleven needed some translation into ES (spanish) and at the end said it didn’t worked.
So what should we do NOW ?
The output message was:
“Instalando plugin desde el archivo: jquery-updater.2.1.0.zip
Descomprimiendo…
Instalando el plugin…
Plugin instalado correctamente.
Activar plugin | Volver a la página de plugins
Algunas de tus traducciones necesitan actualizarse. Espera unos segundos más mientras las actualizamos también.
Actualizando traducciones de Twenty Eleven (es_ES)…
No se ha podido descomprimir el paquete. No se encontraron plugins.
La actualización de la traducción ha fallado.”
Translated would be:
“Installing plugin from file: jquery-updater.2.1.0.zip
Decompressing …
Installing the plugin …
Plugin installed.
Activate plugin | back to plugins
Some of your translations need to be updated. Wait a few seconds while the update too.
Twenty Eleven Updating translation (es_ES) …
Could not decompress the packet. No plugins were found.
The translation update failed.”
This is my website with this problem: https://estefania.zapto.org
those entry pictures should show in a slide-show and not all over the page.
I cleaned up my browser cookies and history and not solution yet.
Also did what @jason102178 did, copied the https://malsup.github.io/jquery.blockUI.js and replaced it into my wordpress site, which is located in www/wp-content/plugins/woocommerce/Assets/js/ .. and cleared cookies, but NOT solution yet.
UPDATE: The solution to get ridd off this pop up is here https://www.ads-software.com/support/topic/blockui-alert?replies=33 but Somehow the update from WordPress 3.5.1 to 3.8.1 damaged my first page, the slide-show of 5 pictures is broken, instead of a slide the 5 pictures show in the same page one under the other.
?? ??