"Why doesn't checkout work in certain browsers?"
Error Code 4000 - BROWSER_DISABLED_OR_NOT_AVAILABLE: No supported browsers available
Browser version too old: Outdated browser not supporting required features
JavaScript disabled: Browser has JavaScript turned off
Browser Extensions: Appcharge doesn't support issues caused by third-party browser extensions,
"Why is WebGL checkout not working?"
CORS policy violations: Cross-origin requests being blocked
Unity server limitations: Using Unity's Build and Run instead of custom server
iframe connection refused: Security policies preventing iframe loading
WebGL build configuration: Incorrect Unity WebGL settings
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