
This usually happens because the file you're trying to open is a JavaScript file (.js) associated with web extensions or scripts, and your system is trying to open it with Opera as a default browser. Since JavaScript files aren’t meant to be opened directly like normal documents, this triggers errors.
If you're working with Roblox executors or script tools, like those featured on ExecutorDelta, it’s important to handle script files properly. Instead of double-clicking them, open the script in a code editor (like Notepad++ or Visual Studio Code), then run them inside a supported Roblox executor. Tools like Delta Executor allow safe and efficient script execution within Roblox, avoiding these desktop-related issues.