Fix: AWS Lambda Unable to import module / Runtime.ImportModuleError
How to fix the AWS Lambda Runtime.ImportModuleError and Unable to import module error caused by wrong handler paths, missing dependencies, layer issues, and packaging problems.
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Fix: CMake Could Not Find Package Configuration File
How to fix the CMake error 'Could not find a package configuration file' for find_package, covering CMAKE_PREFIX_PATH, dev packages, vcpkg, Conan, module mode, toolchain files, and cross-compilation.
Fix: C# async deadlock — Task.Result and .Wait() hanging forever
How to fix the C# async/await deadlock caused by Task.Result and .Wait() blocking the synchronization context in ASP.NET, WPF, WinForms, and library code.
Fix: Docker container health status unhealthy
How to fix Docker container health check failing with unhealthy status, including HEALTHCHECK syntax, timing issues, missing curl/wget, endpoint problems, and Compose healthcheck configuration.
Fix: ECONNRESET Socket Hang Up Error in Node.js
How to fix the ECONNRESET and socket hang up errors in Node.js caused by server timeouts, keep-alive misconfiguration, proxy issues, large request bodies, SSL/TLS failures, and connection pool exhaustion.
Fix: Firebase Permission Denied Error
How to fix the Firebase 'permission denied' or 'Missing or insufficient permissions' error in Firestore and Realtime Database. Covers security rules, authentication state, custom claims, Admin SDK, rule simulators, time-based rules, and document-level permissions.
Fix: Git submodule update failed / fatal: not a git repository
Resolve Git submodule update and init failures including 'fatal: not a git repository', path conflicts, URL mismatches, shallow clone issues, and CI/CD checkout problems.
Fix: Gradle Could Not Resolve Dependencies Error
How to fix Gradle's 'Could not resolve all dependencies' error caused by missing repositories, offline mode, proxy issues, version conflicts, and corrupted cache.
Fix: Java ClassCastException: class X cannot be cast to class Y
How to fix Java ClassCastException by using instanceof checks, fixing generic type erasure, resolving ClassLoader conflicts, correcting raw types, and using pattern matching in Java 16+.
Fix: Jest Cannot Find Module Error
How to fix the Jest 'Cannot find module' error by configuring moduleNameMapper, moduleDirectories, tsconfig paths, and resolving ESM, monorepo, and dependency issues.
Fix: MongoDB E11000 duplicate key error collection
How to fix the MongoDB E11000 duplicate key error by identifying duplicate fields, fixing index conflicts, using upserts, handling null values, and resolving race conditions.
Fix: PHP Warning: Undefined array key (Undefined index)
Fix the PHP warning Undefined array key, Undefined index, and Trying to access array offset on null by checking keys, using the null coalescing operator, and handling PHP 8 strictness.