I've the same problem today. I'm using a Xiaomi Redmi 4X with newest microG LineageOS 22.2 (Android 15) and could not start AquaMail after fresh installation.
Is there some solution?
* New log file session: 2025.06.17 07:44:55.924 +0200
* Package: org.kman.AquaMail 1.37.0-163 (103700163)[APK]
* Process: pid 7033, elapsed CPU 1 seconds
* Build: Xiaomi, lineage_Mi8937, MSM8937, ver. lineage_Mi8937-userdebug 15 BP1A.250505.005 eng.root dev-keys, rel. 15, fp. Xiaomi/land/land:6.0.1/MMB29M/V10.2.2.0.MALMIXM:user/release-keys
* Memory: Native heap size: 11705968 allocated / 2009760 free, Runtime 134217728 total / 116515016 free / 134217728 max, 128 memory class
*
2025.06.17 07:44:55.926 +0200 [2] <<CRASH>>
Native heap size: 11706240 allocated / 2009488 free, Runtime 134217728 total / 116482248 free / 134217728 max, 128 memory class
java.lang.RuntimeException: Unable to create application org.kman.AquaMail.core.AquaMailApplication: java.lang.IllegalStateException: Can't set data directory suffix: WebView already initialized
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:7704)
at android.app.ActivityThread.-$$Nest$mhandleBindApplication(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2500)
at android.os.Handler.dispatchMessage(Handler.java:109)
at android.os.Looper.loopOnce(Looper.java:232)
at android.os.Looper.loop(Looper.java:317)
at android.app.ActivityThread.main(ActivityThread.java:8934)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:591)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)
Caused by: java.lang.IllegalStateException: Can't set data directory suffix: WebView already initialized
at android.webkit.WebViewFactory.setDataDirectorySuffix(WebViewFactory.java:232)
at android.webkit.WebView.setDataDirectorySuffix(WebView.java:2076)
at org.kman.AquaMail.core.AquaMailApplication.b(SourceFile:7)
at org.kman.AquaMail.core.AquaMailApplication.onCreate(SourceFile:3)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1391)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:7698)
... 9 more
Thread: Thread[main,5,main], id: 2
Caused by:
java.lang.IllegalStateException: Can't set data directory suffix: WebView already initialized
at android.webkit.WebViewFactory.setDataDirectorySuffix(WebViewFactory.java:232)
at android.webkit.WebView.setDataDirectorySuffix(WebView.java:2076)
at org.kman.AquaMail.core.AquaMailApplication.b(SourceFile:7)
at org.kman.AquaMail.core.AquaMailApplication.onCreate(SourceFile:3)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1391)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:7698)
at android.app.ActivityThread.-$$Nest$mhandleBindApplication(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2500)
at android.os.Handler.dispatchMessage(Handler.java:109)
at android.os.Looper.loopOnce(Looper.java:232)
at android.os.Looper.loop(Looper.java:317)
at android.app.ActivityThread.main(ActivityThread.java:8934)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:591)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)