Solved Theme Error

Just tried out the themes and am getting the following error:
I cannot open the app, even after a restart and feel the only way around this will be an uninstall / reinstall.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.joaomgcd.join/com.joaomgcd.join.activity.ActivityMain}: android.view.InflateException: Binary XML file line #16: Binary XML file line #16: Error inflating class android.support.design.widget.AppBarLayout

com.joaomgcd.join version 1.7.3b
OS Build OPR1.170623.026
OS Code 26
Device Pixel
Manufacturer Google
Product sailfish

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.joaomgcd.join/com.joaomgcd.join.activity.ActivityMain}: android.view.InflateException: Binary XML file line #16: Binary XML file line #16: Error inflating class android.support.design.widget.AppBarLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.view.InflateException: Binary XML file line #16: Binary XML file line #16: Error inflating class android.support.design.widget.AppBarLayout
Caused by: android.view.InflateException: Binary XML file line #16: 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:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:647)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:866)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.m.b(SourceFile:287)
at android.support.v7.app.e.setContentView(SourceFile:139)
at com.joaomgcd.support.navigationdrawer.a.onCreate(SourceFile:112)
at com.joaomgcd.join.activity.ActivityMain.onCreate(SourceFile:47)
at android.app.Activity.performCreate(Activity.java:6975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library.
at android.support.design.widget.r.a(SourceFile:33)
at android.support.design.widget.AppBarLayout.<init>(SourceFile:158)
... 28 more

 

The version from the play store (1.7.3b.bf1) is working with a theme enabled. I did have to set up Join again (painless).
Thanks again!