Using Database Connection

I need to get some help with database connections. I recently moved my website to an online server. Changed the server connection to point to the correct location using the server connection app. I can view the tables in the docker app but when I use these tables on the client side no data appears on a simple request form.

Following the code I am receiving the following error

serverconnectForm.js:262 POST https://knights-parker-7880.org/dmxConnect/api/BE_act/login/log_in_action.php 500 (Internal Server Error)

Can someone please give me some help?

Thanks;
Jim