[prjkt.io] AndyYan:
One month passed and I'm reporting here again - Substratum crashes on clicking any theme (old/new template, self-made or downloaded) after version 730. 730 behaved alright with all themes I tested it on. Now that the app has an inbuilt debugging feature, here is the output:

Build version: eight hundred fourty two
Current date: 2017-09-16 18:50:24
Device: Xiaomi Mi-4c

Stack trace:
java.lang.RuntimeException: Unable to start activity ComponentInfo{projekt.substratum/projekt.substratum.InformationActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.AppBarLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2684)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2751)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1496)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6186)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.AppBarLayout
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class android.support.design.widget.AppBarLayout
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
at android.view.LayoutInflater.createView(LayoutInflater.java:645)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at android.support.v7.app.m.b(Unknown Source)
at android.support.v7.app.e.setContentView(Unknown Source)
at projekt.substratum.InformationActivity.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:6684)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2637)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2751)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1496)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6186)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Caused by: android.content.res.Resources$NotFoundException: File res/mipmap-xxhdpi-v4/round_launcher.png from xml type anim resource ID #0x7f020000
at android.content.res.ResourcesImpl.loadXmlResourceParser(ResourcesImpl.java:990)
at android.content.res.Resources.loadXmlResourceParser(Resources.java:2103)
at android.content.res.Resources.getAnimation(Resources.java:1139)
at android.animation.AnimatorInflater.loadStateListAnimator(AnimatorInflater.java:169)
at android.support.design.widget.ViewUtilsLollipop.setStateListAnimatorFromAttrs(Unknown Source)
at android.support.design.widget.AppBarLayout.<init>(Unknown Source)
... 25 more
Caused by: java.io.FileNotFoundException: Corrupt XML binary file
at android.content.res.AssetManager.openXmlAssetNative(Native Method)
at android.content.res.AssetManager.openXmlBlockAsset(AssetManager.java:519)
at android.content.res.ResourcesImpl.loadXmlResourceParser(ResourcesImpl.java:975)
... 30 more

User actions:
2017-09-16 18:49:59: RescueActivity created
2017-09-16 18:49:59: RescueActivity destroyed
2017-09-16 18:50:04: LauncherActivity created
2017-09-16 18:50:04: SplashScreenActivity created
2017-09-16 18:50:04: SplashScreenActivity resumed
2017-09-16 18:50:14: LauncherActivity destroyed
2017-09-16 18:50:17: SplashScreenActivity paused
2017-09-16 18:50:17: MainActivity created
2017-09-16 18:50:17: MainActivity resumed
2017-09-16 18:50:18: SplashScreenActivity destroyed
2017-09-16 18:50:24: MainActivity paused
2017-09-16 18:50:24: ThemeLaunchActivity created
2017-09-16 18:50:24: ThemeLaunchActivity resumed
2017-09-16 18:50:24: ThemeLaunchActivity paused
2017-09-16 18:50:24: ThemeLaunchActivity resumed
2017-09-16 18:50:24: ThemeLaunchActivity paused
2017-09-16 18:50:24: ThemeLaunchActivity resumed
2017-09-16 18:50:24: ThemeLaunchActivity paused
2017-09-16 18:50:24: InformationActivity created

I'm on official LineageOS, if that matters - I know it doesn't support Sub under OMS mode and I had to resort to RRO, but unless the team decided to stop support for RRO, I don't think that's the culprit...