Ganache CLI fails with "Error: callback already called"

Update to the latest Ganache CLI to fix the issue.

Issue

An attempt to start Ganache CLI fails with:

Error: callback already called

Cause

Ganache CLI version lower than v6.12 does not support Node.js version 14. See the Ganache CLI issue on GitHub.

Solution

Update to Ganache CLI v6.12+.

See also:

• Forking Ethereum mainnet with Ganache CLI
• Using MetaMask with a remote Ganache CLI node