Values from strings.xml not found in capacitor AndroidManifest.xml

I’m trying to get my project to compile with the jeduan/cordova-plugin-facebook4 cordova plugin. I have included my facebook id and app name in the app/src/main/res/values/strings.xml like so:

<?xml version="1.0" encoding="UTF-8"?>
<resources>
    <string name="app_name">UI</string>
    <string name="title_activity_main">UI</string>
    <string name="package_name">[redacted]</string>
    <string name="fileprovider_authority">[redacted]</string>
    <string name="custom_url_scheme">[redacted]</string>
    <string name="fb_app_id">[redacted]</string>
    <string name="fb_app_name">UI</string>
</resources>

I have also added the necessary facebook values to app/src/main/AndroidManifest.xml like so:

...
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/fb_app_id"/>
<meta-data android:name="com.facebook.sdk.ApplicationName" android:value="@string/fb_app_name" />
<activity android:name="com.facebook.FacebookActivity"
          android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
          android:label="@string/fb_app_name" />
...

Despite this fact I am getting this error upon compilation:

dManifest.xml:13: AAPT: error: resource string/fb_app_id (aka capacitor.android.plugins:string/fb_app_id) not found.
    
/Users/nstokoe/code/fullmeasure/prototype/ui/node_modules/@capacitor/cli/assets/capacitor-android-plugins/build/intermediates/manifests/aapt/release/AndroidManifest.xml:16: AAPT: error: resource string/fb_app_name (aka capacitor.android.plugins:string/fb_app_name) not found.
    
/Users/nstokoe/code/fullmeasure/prototype/ui/node_modules/@capacitor/cli/assets/capacitor-android-plugins/build/intermediates/manifests/aapt/release/AndroidManifest.xml:20: AAPT: error: resource string/fb_app_name (aka capacitor.android.plugins:string/fb_app_name) not found.

The file it is complaining about looks like this in my node_modules:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:amazon="http://schemas.amazon.com/apk/res/android"
    xmlns:android="http://schemas.android.com/apk/res/android"
    package="capacitor.android.plugins"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="21"
        android:targetSdkVersion="27" />

    <application>
        <meta-data
            android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/fb_app_id" />
        <meta-data
            android:name="com.facebook.sdk.ApplicationName"
            android:value="@string/fb_app_name" />

        <activity
            android:name="com.facebook.FacebookActivity"
            android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:label="@string/fb_app_name" />
    </application>

</manifest>

Is there something I am missing to make the values defined in strings.xml available to the manifest files in the capacitor module?

[ThonyFD]

For someone facing this issue building release versions:

change assemblerelease for app:assemblerelease

Read this for more info: https://stackoverflow.com/questions/60990805/difference-between-appassemblerelease-and-assemblerelease

[matheo]

For the record, adding the missing fb_app_id and fb_app_name to app/src/main/res/values/strings.xml worked for me, but it’s concerning to not have them added automatically from the plugin config.