my problem is related to Android Studio.Whenever I try to run my app I get an error that says default activity not found.Please help me out,it's really important.Thank you in advance! Just in case,I've got 2 classes: the first one is MainActivity,the second one is CatRepository
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.cats">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".ui.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>