3.0.4 is stuck in Checking System status

My Local by Flywheel is perpetually stuck in the Checking System… stage of startup. I saw the posts about needing to update manually, so I did that, but still no change. Here is the end of my logs where it fails:

Jan 29, 2019, 8:21 AM MST - info: [main/EnvironmentLoader] Successfully Loaded Environment: /Applications/Local by Flywheel.app/Contents/Resources/extraResources/environments/flywheel-1-3-2/out/environment.js
Jan 29, 2019, 8:21 AM MST - info: [main/check-system] Check System: Docker Machine:
{ stdout: ‘’,
stderr:
‘error getting state for host local-by-flywheel: exit status 126\n’ }
Jan 29, 2019, 8:21 AM MST - info: [main/set-docker-env] Getting Docker Machine env.
Jan 29, 2019, 8:21 AM MST - info: [main/set-docker-env] Received Docker Machine env.
Jan 29, 2019, 8:21 AM MST - error: [main/index]
{ message: ‘Cannot read property ‘forEach’ of null’,
stack:
‘TypeError: Cannot read property ‘forEach’ of null\n at exports.(anonymous function) (/Applications/Local by Flywheel.app/Contents/Resources/app.asar/helpers/process-exports-vars.js:1:737)\n at _child_process2.(anonymous function).(anonymous function) (/Applications/Local by Flywheel.app/Contents/Resources/app.asar/main/actions-docker/set-docker-env.js:1:3305)\n at ChildProcess.exithandler (child_process.js:310:5)\n at ChildProcess.emit (events.js:182:13)\n at ChildProcess.EventEmitter.emit (domain.js:442:20)\n at maybeClose (internal/child_process.js:961:16)\n at Process.ChildProcess._handle.onexit (internal/child_process.js:248:5)’ }
Jan 29, 2019, 8:21 AM MST - error: [main/index] TypeError: Cannot read property ‘forEach’ of null
at exports.(anonymous function) (/Applications/Local by Flywheel.app/Contents/Resources/app.asar/helpers/process-exports-vars.js:1:737)
at _child_process2.(anonymous function).(anonymous function) (/Applications/Local by Flywheel.app/Contents/Resources/app.asar/main/actions-docker/set-docker-env.js:1:3305)
at ChildProcess.exithandler (child_process.js:310:5)
at ChildProcess.emit (events.js:182:13)
at ChildProcess.EventEmitter.emit (domain.js:442:20)
at maybeClose (internal/child_process.js:961:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:248:5)