This error occurs when the Renderings defined in Sitecore and the components defined in the JSS app do not match.
Rishi - You said you deployed using jss deploy files - this command deploys the JS bundle, but does not create any Sitecore items.
When switching from Code-First to Sitecore-First, it is recommended to use jss deploy app to ensure that files, and ...
Based on recent development on Sitecore JSS with Multisite, if each site has its own JSS App, then your setup will be as follows:
What will be the value for "layoutServiceHost" and "deployUrl" since
we will be using same sitecore instance for both the apps