Improve Internal Error Handling

[jonrandahl]

Discovered the error templating is throwing a 500 error when I mistyped a url while testing out the latest changes.

Live link to show a un-styled server response displayed to the user:

https://landregistry.data.gov.uk/app/ukhpi/browse?from=2023-08-01&location=http%3A%2F%2Flandregistry.data%20.gov.uk%2Fid%2Fregion%2Funited-kingdom&to=2024-08-01&lang=en

Note the extra space between .data and .gov.uk

Also throwing 500 error for 404:
https://landregistry.data.gov.uk/app/ukhpi/browser?from=2023-08-01&location=http%3A%2F%2Flandregistry.data.gov.uk%2Fid%2Fregion%2Funited-kingdom&to=2024-08-01&lang=en

Note the mistyped browser end path