rogerc I am using osticket 1.14 on Ubuntu 18.04 server.
This does not tell us the rest of the information about your web environment.
^ This is not a supported web server software at this time. While you can get it to work it does require numerous nginx configuration changes to get it to work. There are threads about it over at github, you might want to peruse them.
I highly recommend that you read: Please read before requesting assistance
MariaDB? MySQL? Version?
PHP Version?
Do you have PHP error logging disabled or something?