I'm using Magento 2.3.3 installed in live server.
I don't know why some of the Magento admin tabs are not working including general, shipping setting/config/methods but the rest extension, etc are working fine. It was working fine a few days ago when I setting up all the shipping payment methods etc.
I tried to deled all the cache, session, page_cache, etc, and run upgrade, deploy and reindex command but it's not working.
