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My sketch compiles but does not upload or the upload button is grayed out

If you have this issue, please take a look at this common easy fixes:

  • Make sure you have installed the Arduino Create Agent.

  • Check if the Arduino Create Agent is running. On Windows, look for an Arduino icon in the taskbar. On macOS and Linux it will be located in the menu bar. The icon should be either black or white depending on your system, not grayed out. If it is grayed out, rick-click and select Run Agent.

  • Use Arduino Cloud in the same browser the Create Agent is installed.

  • Avoid using USB 3.0, since it can cause some issues.

  • Check if the Create Agent has been blocked by firewall or antivirus.

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