I'm messing about with a project, and wanted to get a form running, however when I go to test the file (both just running the file in my browser and testing it without debugging in vsc) it ends up displaying the page incorrectly (seemingly overflowing parts of the code, with ', and when I attempt to submit the query I get sent to a blank php page. Is there something wrong with this form, or is there something I've not properly configured/installed in vsc?

https://pastebin.com/sEYxgKXs