If you see Runtime error R6025 - Pure Virtual Function Call message when running an app, then one of these fixes is sure to help you.

Are you receiving Windows cannot connect to the printer; Operation failed, Error 0x0000052e? Read this guide to fix the problem.

Fatal error: Uncaught Error: Class "mysqli" not found in /data/.... For any MySql Database users, Class Mysqli not found means a critical extension is not enabled or missing.

The upstream connect error or disconnect/reset before headers is caused by a client-server disruption. Here's how you can fix it!