Fix headed browserType.launch has been closed error

[jcandan]

Getting the following error when attempting to run tests in headed mode:

$ ddev playwright test --headed

Running 3 tests using 3 workers
  1) [firefox] › tests/snapshots.spec.ts:5:5 › Snapshot visual regession of Homepage ───────────────

    Error: browserType.launch: Target page, context or browser has been closed

[deviantintegral]

What do you see in the VNC connection? Does the browser start up and run?