murdocklawless can you check your <flarum>/storage/logs
folder for the log file of the day and copy the error message you find in there? It will probably be copied multiple times if you made multiple attempts. The message will start with the date+time and might be multiple lines long until the next date+time of the next error.
You could also enable debug
in config.php
and try again to see the error message on-screen.