Debugging Next.js
Solutions for common Next.js errors, bugs, and troubleshooting guides

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Debugging is an essential skill when working with any framework, and Next.js is no exception. Understanding common errors and how to fix them can save you hours of frustration.

In this unit, you’ll learn how to diagnose and fix common Next.js issues. We’ll cover problems like blank pages after navigation, Prisma client issues in development, redirect problems, module errors, and other gotchas that developers frequently encounter. Each lesson provides clear explanations of why these issues occur and step-by-step solutions to fix them.

When you run into a confusing error in your Next.js application, check this unit first - the solution might already be here.

Lessons in this unit:

0: ▶︎ Introduction
1: Blank page after router.push() in Next.js?
2: How to fix the error `PrismaClient is unable to be run in the browser` in Next.js
3: Next.js, blank page after calling `res.redirect()`
4: Next.js, how to fix the error `Constructor requires 'new' operator`
5: Next.js, fix the `module not found` error
6: How to fix the `can't resolve module` error in Next.js
7: How to fix error serializing Date object JSON in Next.js
8: How to fix the `unable to resolve dependency tree` PostCSS and Tailwind issue in Next.js
9: Fix “Module not found: Can't resolve encoding” in Next.js
10: How to fix Your custom PostCSS configuration must export a `plugins` key.
11: Next.js, what to do when the state of a component is not refreshed when navigating
12: Revalidation and ISR gotcha on Vercel
13: How to fix the `Already 10 Prisma Clients are actively running` error