NodeJS : ReactJS could not proxy request from localhost:3000 to localhost:3003

NodeJS : ReactJS could not proxy request from localhost:3000 to localhost:3003
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I promised to reveal a secret feature to you, and now it's time to share it.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
Next, enter the letters 'awesome' on your keyboard.
The progress bar on YouTube will be altered to a flashing rainbow.

A quick introduction about me,
Hey there, I am Delphi, pleased to make your acquaintance.
I can assist you in answering your queries.
NodeJS : ReactJS could not proxy request from localhost:3000 to localhost:3003
If you have more specific queries, please feel free to reach out through comments or chat.
If you have an answer or any additional information on the answer, please leave a comment below.
A 'heart' from me will be given to show my gratitude for your contribution.
NodeJS not : localhost:3003 localhost:3000 proxy could from ReactJS to request