Some who I can update my records in my crud but I cannot insert a new record aka (Add a Contact). The exact code in the site allows me to insert a record on my local machine but that same code does not work on this domain/live site. Why?
Error in console: Failed to load resource: the server responded with a status of 500 (Internal Server Error)
There is a couple of possibilities I can list you why you got an Error 500 (Internal Server Error):
The free hosting server cannot support that code or the code is incompatible with the free server.
Some files/codes went missing/corrupted and those files/codes are necessary for the “Add a contact” thingy to work but since some of them went missing or gone corrupted then that certain script of yours will not be able to execute properly.