Issues deploying to Heroku - node.js

Question

Cannot for the life of me figure out what's stopping my app from deploying to Heroku (update). The relevant error logs and package.json sections are below. Some things I've tried are updating and de-updating all my packages, adding engine specifications for node and npm to the package.json, removing a few packages to see if they were interfering (the first time it failed there was error message about TipTap, a WYSIWYG editor on my app, also one attempt indicated it might be Tailwind), and I've deleted and reinstalled the node modules and package-lock files.
Heroku activity log:
...
remote: > bufferutil#4.0.7 install /tmp/build_c2557cec/client/node_modules/react-scripts/node_modules/webpack-plugin-serve/node_modules/bufferutil
remote: > node-gyp-build
remote:
remote: npm ERR! Linux 4.4.0-1104-aws
remote: npm ERR! argv "/tmp/build_c2557cec/.heroku/node/bin/node" "/tmp/build_c2557cec/node_modules/.bin/npm" "install"
remote: npm ERR! node v19.5.0
remote: npm ERR! npm v2.15.12
remote: npm ERR! path /tmp/build_c2557cec/client/node_modules/tailwindcss/node_modules/#types/node/package.json
remote: npm ERR! code ENOTDIR
remote: npm ERR! errno -20
remote: npm ERR! syscall open
remote:
remote: npm ERR! ENOTDIR: not a directory, open '/tmp/build_c2557cec/client/node_modules/tailwindcss/node_modules/#types/node/package.json'
...
My package.json engines and dependences:
...
"engines": {
"node": "19.x",
"npm": "8.x"
},
"private": false,
"dependencies": {
"#emailjs/browser": "^3.7.0",
"autoprefixer": "^10.4.7",
"axios": "^0.27.2",
"html-react-parser": "^3.0.4",
"postcss": "^8.4.14",
"react": "^18.1.0",
"react-dom": "^18.1.0",
"react-icons": "^4.4.0",
"react-paginate": "^8.1.3",
"react-router-dom": "^6.7.0",
"react-scripts": "^5.0.1",
"tailwindcss": "^3.1.6"
},
...