Laravel 12, released in early 2025, brings streamlined bootstrapping, enhanced error handling, and improved performance features. However, even with these advancements, developers often encounter common pitfalls that can halt progress. In this guide, we cover the 11 most frequent Laravel 12 errors — from permission denials and class-not-found issues to CORS failures and cache headaches. Each error includes the root cause, a step-by-step fix, and complete code examples so you can debug faster and ship with confidence.
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