Default settings throwing error

Done some further searching, the only thing that’s made even the slightest difference was another thread on these forums.
React Native Packager Hangs (Proxy related)
The OP had the same error as me, but a slightly different set up.
I’ve followed one of the comments that recommended updating the value for urlRandomness in .expo/settings.json to be encapsulated with quotes.
Doing this and then launching the project returns a different error.

{"name":"default_project","description":"A very interesting project.","slug":"default_project","privacy":"public","sdkVersion":"31.0.0","platforms":["ios","android"],"version":"1.0.0","orientation":"portrait","icon":"./assets/images/icon.png","splash":{"image":"./assets/images/splash.png","resizeMode":"contain","backgroundColor":"#ffffff","imageUrl":"http://192.168.0.100:19001/assets/./assets/images/splash.png"},"updates":{"fallbackToCacheTimeout":0},"assetBundlePatterns":["**/*"],"ios":{"supportsTablet":true},"xde":true,"developer":{"tool":"expo-cli","projectRoot":"/home/pi/shared/default_project"},"packagerOpts":{"hostType":"lan","lanType":"ip","dev":true,"minify":false,"urlRandomness":"null"},"env":{},"bundleUrl":"http://192.168.0.100:19001/node_modules/expo/AppEntry.bundle?platform=ios&dev=true&minify=false&hot=false&assetPlugin=%2Fhome%2Fpi%2Fshared%2Fdefault_project%2Fnode_modules%2Fexpo%2Ftools%2FhashAssetFiles","debuggerHost":"192.168.0.100:19001","mainModuleName":"node_modules/expo/AppEntry","logUrl":"http://192.168.0.100:19000/logs","hostUri":"192.168.0.100:19000","iconUrl":"http://192.168.0.100:19001/assets/./assets/images/icon.png"}

I’ve attempted to google even parts of this error, and haven’t found anything that seems to be relevant.
Does anyone know what could potentially be causing this, or how to resolve?