expo Issue with CRNA

hello all
when i install CRNA and create hello world app of CRNA readme, I face the following error in expo

my andriod phone api is 19 and the app as follow:
package.json
“dependencies”: {
“expo”: “^27.0.1”,
“react”: “16.3.1”,
“react-native”: “~0.55.2”
}

app.json
“expo”: {
“sdkVersion”: “27.0.0”
}

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