I only installed English when I first set up the server. But at some point trying my own troubleshooting I noticed there were 3 language pack folders in the Windows folder (fr-FR, it-IT, ko-KO) so I added those 3 as languages and was surprised to see there was already an 'uninstall this language pack' option for each of them. I uninstalled the language pack and removed all 3 language options as well thinking it might resolve the error.