Fatal error after updating extensions: "Call to a member function get() on a non-object in system/engine/controller.php"

Hi,

I am running OpenCart version 2.3.0.2, and I installed an extension for allowing the upload of multiple product images. Shortly afterwards, when I accessed the front end of my website, I received the following error:

Fatal error: Call to a member function get() on a non-object in ... /system/engine/controller.php on line 10

I have refreshed the modification cache, uninstalled and removed the extension I installed, as well as disabling all of my other extensions, however the error still persists. Any idea how I can resolve this?

Thanks.

Registry wasn't initialized properly somehow. Probably, you still have a modification active, so check your modification/vqmod cache for starters.