When trying to update the module to the latest version after installing OC v2.0.1.1 I get this error (Modification requires a unique ID code!) on the Extension Installer page under the progress bar.

Any help would be invaluable.

Hello Billy,

The latest OpenCart version (2.0.1.1) requires all of the modifications that are uploaded to have a unique code. If you are upgrading a module, you are recommended to first delete the old modification from Extension=> Modifications, then to CLEAR the modifications, to REFRESH them, and only afterwards to upload the latest version of the module.

Currently, most of our modules have the functionality to delete the old modifications and to perform the whole process explained above automatically while being installed, but still, some of them don't have this feature implemented yet.

I hope this helps!