Hi, I have the same issue.
Below is the expo diagnose Result:
Expo CLI 2.20.1 environment info:
System:
OS: Windows 10
Binaries:
Node: 10.15.3 - D:\Program\nodejs\node.EXE
Yarn: 1.16.0 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 6.9.0 - C:\Users\Owner\AppData\Roaming\npm\npm.CMD