1. Ensure your versions of Node.js and npm are compatible with Tailwind CSS. Run below code in terminal to find the versions

node -v npm -v

and make sure Node.js: Use version 16.x or newer; npm: Use version 8.x or newer.

2. Clear npm Cache

Sometimes, a corrupted npm cache causes issues. Clear it by running the code below on terminal:

npm cache clean --force

3. Delete node_modules and Reinstall Dependencies Corrupted node_modules or package-lock.json files can lead to issues. Run below code one by one:

step 1:

rm -rf node_modules package-lock.json

step 2:

npm install

4. Install Tailwind CSS Properly

Run the following commands step-by-step:

Step 1: Install Tailwind CSS and related dependencies by running the below code:

npm install -D tailwindcss postcss autoprefixer

Step 2: Initialize Tailwind CSS configuration by running the below code:

npx tailwindcss init -p

The issue should be resolved by now.