AAPT error: resource drawable/... not found

After recently upgrading my android studio, I am not able to build my project anymore.

Every time I execute a build, I am struck with the following error:

error: resource drawable/splash_screen (aka com.whereisthemonkey.nowalism:drawable/splash_screen) not found.
Message{kind=ERROR, text=error: resource drawable/splash_screen (aka com.whereisthemonkey.nowalism:drawable/splash_screen) not found., sources=[C:\Users\Lucas\.gradle\caches\transforms-1\files-1.1\appcompat-v7-27.1.1.aar\cf575568f869a44c685b16e47de83a28\res\values\values.xml:1632:5-84], original message=, tool name=Optional.of(AAPT)}

This error persists, even though the file splash_screen.xml exists under the drawable folder.

Rebuilding, cleaning the project and invalidating caches did not work!

Adding the line android.enableAapt2=false does not resolve the real issue and I would therefore rather find the root of the problem.

The following shows my gradle.build file:

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

apply plugin: 'kotlin-kapt'//https://github.com/bumptech/glide/issues/1939

android {
    compileSdkVersion 27
    buildToolsVersion "27.0.3"
    defaultConfig {
        applicationId "com.whereisthemonkey.nowalism"
        minSdkVersion 19
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    // Keep the following configuration in order to target Java 8.
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main {
            res.srcDirs += [
                    'src/main/res-backgrounds',
                    'src/main/res-jobs',
            ]
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:cardview-v7:27.1.1'
    implementation 'com.android.support:recyclerview-v7:27.1.1'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'

    //Do not update due to dex error
    implementation 'org.apache.commons:commons-lang3:3.6'

    //Do not update due to dex error
    implementation 'com.google.firebase:firebase-auth:11.8.0'
    implementation 'com.google.firebase:firebase-messaging:11.8.0'
    implementation 'com.google.android.gms:play-services:11.8.0'

    implementation 'com.aurelhubert:ahbottomnavigation:2.1.0'
    implementation 'com.afollestad.material-dialogs:core:0.9.6.0'
    implementation 'com.afollestad.material-dialogs:commons:0.9.6.0'

    implementation 'com.amitshekhar.android:android-networking:1.0.1'
    implementation 'org.apache.directory.studio:org.apache.commons.io:2.4'

    implementation 'com.github.ome450901:SimpleRatingBar:1.4.1'

    implementation 'com.sothree.slidinguppanel:library:3.4.0'

    implementation 'com.github.esafirm.android-image-picker:imagepicker:1.12.0'
    //Do not update due to dex error
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.5.1'

    implementation 'com.github.bumptech.glide:glide:4.6.1'
    kapt 'com.github.bumptech.glide:compiler:4.6.1'//https://github.com/bumptech/glide/issues/1939

    implementation 'com.github.PhilJay:MPAndroidChart:v3.0.3'

    implementation 'de.hdodenhof:circleimageview:2.2.0'

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'

    implementation 'com.firebaseui:firebase-ui-auth:3.2.1'
    implementation 'com.android.support:support-v4:27.1.1'
}


apply plugin: 'com.google.gms.google-services'

Any help is kindly appreciated.

I fixed the error, which was probably coming from a mal-formatted copied XML file (probably some line-ending confusion)

Rewriting those fixed the error, although Android Studio displayed another file as the source of the problem, which in fact had nothing to do with the error itself.