diff --git a/app/src/main/java/com/vanced/manager/model/ProgressModel.kt b/app/src/main/java/com/vanced/manager/model/ProgressModel.kt
index c0014803..208e343c 100644
--- a/app/src/main/java/com/vanced/manager/model/ProgressModel.kt
+++ b/app/src/main/java/com/vanced/manager/model/ProgressModel.kt
@@ -23,7 +23,7 @@ open class ProgressModel {
     }
 
     init {
-        installing.value = false
+        installing.postValue(false)
         reset()
     }
     
diff --git a/app/src/main/java/com/vanced/manager/utils/DownloadHelper.kt b/app/src/main/java/com/vanced/manager/utils/DownloadHelper.kt
index 10cd58a8..d0de8774 100644
--- a/app/src/main/java/com/vanced/manager/utils/DownloadHelper.kt
+++ b/app/src/main/java/com/vanced/manager/utils/DownloadHelper.kt
@@ -117,7 +117,7 @@ object DownloadHelper : CoroutineScope by CoroutineScope(Dispatchers.IO) {
 
     fun downloadManager(context: Context) {
         val url = "https://github.com/YTVanced/VancedManager/releases/latest/download/manager.apk"
-        download(url,"https://github.com/YTVanced/VancedManager", "manager", "manager.apk", context, onDownloadComplete = {
+        download(url,"https://github.com/YTVanced/VancedManager/", "manager", "manager.apk", context, onDownloadComplete = {
             val apk = File("${context.getExternalFilesDir("manager")?.path}/manager.apk")
             val uri =
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
diff --git a/app/src/main/java/com/vanced/manager/utils/PackageHelper.kt b/app/src/main/java/com/vanced/manager/utils/PackageHelper.kt
index 7315dc5f..824c4f06 100644
--- a/app/src/main/java/com/vanced/manager/utils/PackageHelper.kt
+++ b/app/src/main/java/com/vanced/manager/utils/PackageHelper.kt
@@ -161,23 +161,28 @@ object PackageHelper {
     }
 
     fun install(path: String, context: Context) {
-        val callbackIntent = Intent(context, AppInstallerService::class.java)
-        val pendingIntent = PendingIntent.getService(context, 0, callbackIntent, 0)
-        val packageInstaller = context.packageManager.packageInstaller
-        val params = PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
-        val sessionId = packageInstaller.createSession(params)
-        val session = packageInstaller.openSession(sessionId)
-        val inputStream: InputStream = FileInputStream(path)
-        val outputStream = session.openWrite("install", 0, -1)
-        val buffer = ByteArray(65536)
-        var c: Int
-        while (inputStream.read(buffer).also { c = it } != -1) {
-            outputStream.write(buffer, 0, c)
+        try {
+            val callbackIntent = Intent(context, AppInstallerService::class.java)
+            val pendingIntent = PendingIntent.getService(context, 0, callbackIntent, 0)
+            val packageInstaller = context.packageManager.packageInstaller
+            val params = PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
+            val sessionId = packageInstaller.createSession(params)
+            val session = packageInstaller.openSession(sessionId)
+            val inputStream: InputStream = FileInputStream(path)
+            val outputStream = session.openWrite("install", 0, -1)
+            val buffer = ByteArray(65536)
+            var c: Int
+            while (inputStream.read(buffer).also { c = it } != -1) {
+                outputStream.write(buffer, 0, c)
+            }
+            session.fsync(outputStream)
+            inputStream.close()
+            outputStream.close()
+            session.commit(pendingIntent.intentSender)
+        } catch (e: IOException) {
+            Log.d(INSTALLER_TAG, e.stackTraceToString())
         }
-        session.fsync(outputStream)
-        inputStream.close()
-        outputStream.close()
-        session.commit(pendingIntent.intentSender)
+
     }
 
     private fun installRootMusic(files: ArrayList<FileInfo>, context: Context): Boolean {
@@ -338,7 +343,6 @@ object PackageHelper {
             } catch (e: IOException) {
                 e.printStackTrace()
             }
-
         } finally {
             session?.close()
         }
diff --git a/core-ui/src/main/java/com/vanced/manager/core/ui/ext/FragmentExt.kt b/core-ui/src/main/java/com/vanced/manager/core/ui/ext/FragmentExt.kt
index c7fe6fe0..6dc5d24d 100644
--- a/core-ui/src/main/java/com/vanced/manager/core/ui/ext/FragmentExt.kt
+++ b/core-ui/src/main/java/com/vanced/manager/core/ui/ext/FragmentExt.kt
@@ -1,10 +1,16 @@
 package com.vanced.manager.core.ui.ext
 
+import android.util.Log
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.Fragment
 
 fun Fragment.requireSupportFM() = requireActivity().supportFragmentManager
 
 fun <D : DialogFragment> Fragment.showDialog(dialog: D) {
-	dialog.show(requireSupportFM(), dialog::class.simpleName)
+	try {
+		dialog.show(requireSupportFM(), dialog::class.simpleName)
+	} catch (e: IllegalStateException) {
+		Log.d("VMUI", "Can not perform this action after onSaveInstanceState")
+	}
+
 }
\ No newline at end of file