If you installed expo before, please temporary do not upgrade to their latest version.

Please do the following steps to resolve this issue:

Step 1: Open terminal

Step 2: Run npm uninstall expo-cli

Step 3: Run expo-cli -g –unsafe-perm=true

Step 4: Run ls -la ~/

If you see .profile on your terminal, please run nano ~/.profile

Otherwise, please run nano ~/.bash_profile

Step 5: Put export NODE_PATH=/usr/local/lib/node_modules to the end of the file. Then press control + x

Terminal will ask for Save modified buffer (ANSWERING “No” WILL DESTROY CHANGES) => Please press y then Press Enter

Step 6: Run source ~/.bash_profile

Now, run expo –help, this command line should work. And you can build app by following https://documentation.wilcity.com/ => Wilcity App