What is the sequence of steps to obtain the TSL certificate using the CSR?

What do I do with the CSR file ?

I pasted it here:

However after obtaining the code, and pasting it back to MIAB, system says that what I have is not certificate.

How does one get the certificate with the CSR ?

You will not need to concern yourself with any CSR files if you attack the underlying issue you have which is addressed here: