[Plugin: Native Apps Builder] appsbuilder.php does not exist

I get the following error when activating on multisite
An Error Was Encountered
The configuration file appsbuilder.php does not exist.

Can you help as your site does look the best way to build the sort of app I’m after. I’ve tried to network activate and register as new user but still get the same error.

https://www.ads-software.com/extend/plugins/native-apps-builder/