即时模拟器加载

我尝试第一次运行模拟器。就像我按照说明进行了所有操作一样，但是在启动时始终保持恒定的负载，并且没有错误。怎么了？

package.json

{
"expo": {
"name": "my-app","slug": "my-app","privacy": "public","sdkVersion": "35.0.0","platforms": [
"ios","android","web"
],"version": "1.0.0","orientation": "portrait","icon": "./assets/icon.png","splash": {
"image": "./assets/splash.png","resizeMode": "contain","backgroundColor": "#ffffff"
},"updates": {
"fallbackToCacheTimeout": 0
},"assetBundlePatterns": [
"**/*"
],"ios": {
"supportsTablet": true
}
}
}