Magento – Magento Command Line Global Commands

In this case I think you are running into one of three issues.

1. You need to run php bin/magento setup:upgrade to update the list of modules in case you have removed or changed one. If you did remove the Smartwave module without resetting your app/etc/config.php it's possible to get this error.

2. You have removed the Smartwave module but there is still code the uses some of it's classes or extends from it that haven't been updated.

3. You need to clear that var folder's that could have old content in them. They are typically var/di, var/view_preprocessed, var/cache, var/page_cache, var/generation. Clearing these might solve the issue.

From here, I would grep for the use of the Smartwave module in the app and vendor folders and see what comes up to figure out where it's being used.

grep -r "Smartwave" app/*

0) Verify, Are content of js/css files is cached in a browser?

1) Install xdebug and try to debug pub/static.php

2) I am using www-data groups and magento user and 777 for static files.

3) see 2). Do not use root to run static files deploy and do not run it in developer mode. Also, you need clean pub/static folder after setup:static-content:deploy running, because its break automatic redeploy.

4) It looks right