I encountered the common issue of setState() or markNeedsBuild() being called during the build phase in Flutter, which can lead to performance problems and errors. To help others facing the same issue, I’ve written a detailed article explaining the causes and solutions for this problem.

If you're struggling with this error, or if you'd like to learn more about handling state updates correctly in Flutter, you can check out the article here: How to Fix the setState() or markNeedsBuild() Called During Build Error in Flutter.