Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Problem Solution Step 1. Added implementation ‘com.google.guava:guava:27.0.1-android’ at the end of my android/app/build.gradle file and the error went away. Source:- Stackoverflow Step 2. Run flutter clean, flutter pub get and run your project. That’s all. I hope it fixed your error. Keep Coding.