Error: connection not open
at WebsocketProvider.send (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/web3-providers-ws/src/index.js:282:18)
at Timeout._onTimeout (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/web3-providers-ws/src/index.js:267:19)
at listOnTimeout (internal/timers.js:554:17)
at processTimers (internal/timers.js:497:7)
PLATFORM: darwin GANACHE VERSION: 2.7.1
EXCEPTION: