Anything in the server log that shows up?

You might be missing CSRF token. Make sure the form is loaded completely before submitting it.

How to get that CSRF token?

This is what I got in server log:

ERROR 04 Mar. 2021 10:31:29 org.joget.commons.spring.web.CustomContextLoaderListener - ===== Error initializing WebApplicationContext =====

Check if the database connection URL, port and other database credentials are correct in the configuration file.

Also verify if you are using correct JDBC driver.

I am using the default database connection. It was working yesterday . Here are the configuration settings if you want to look: 

workflowDriver=com.mysql.cj.jdbc.Driver
workflowUrl=jdbc\:mysql\://localhost\:3307/jwdb?characterEncoding\=UTF-8&useSSL\=false&allowPublicKeyRetrieval\=true&serverTimezone\=UTC
workflowUser=root
profileName=
workflowPassword=

Check if you can access the port 3307 from appserver.

Is this database jwdb up and running? Are you able to connect with this database?

Even I can't connect to the database.