I am working on developing social media app using MERN Stack. First I made it to create post with img, description ans title and display in wall, it works well. but later I wanted to update it to display username with creator’s name. Now I get message ‘Error fetching from server’. this is my post schema and user schema.

First I made it to create post with img, description ans title and display in wall, it works well. but later I wanted to update it to display username with creator’s name. Now I get message ‘Error fetching from server’. this is my post schema and user schema.