Whenever I try flutter run, it gives me the same error and I am not sure what to do - flutter

Question

This is my first flutter project and I am trying to just run the example one that comes with it. I did flutter run in the correct directory and I started an emulator. I am not sure what to do to fix it. At first, there was a problem where it would get stuck at Running Gradle task 'assembleDebug' then I allowed studio.exe and studio64.exe to be allowed through the windows defender firewall.
Here is the error.
Exception in thread "main" java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:225)
at java.util.zip.ZipFile.<init>(ZipFile.java:155)
at java.util.zip.ZipFile.<init>(ZipFile.java:169)
at org.gradle.wrapper.Install.unzip(Install.java:214)
at org.gradle.wrapper.Install.access$600(Install.java:27)
at org.gradle.wrapper.Install$1.call(Install.java:74)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done
0.5s
[!] Gradle threw an error while trying to update itself.
Retrying the update...
Exception in thread "main" java.util.zip.ZipException:
error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:225)
at java.util.zip.ZipFile.<init>(ZipFile.java:155)
at java.util.zip.ZipFile.<init>(ZipFile.java:169)
at org.gradle.wrapper.Install.unzip(Install.java:214)
at org.gradle.wrapper.Install.access$600(Install.java:27)
at org.gradle.wrapper.Install$1.call(Install.java:74)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done
0.3s
[!] Gradle threw an error while trying to update itself. Retrying the update...
Gradle task assembleDebug failed with exit code 1

Answer 1

Few days ago I had a similar problem like this.
https://github.com/flutter/flutter/issues/48159#issuecomment-571513079
Answer is from here, it solved my problem
C:\Users\uejaz.gradle\wrapper\dists\gradle-5.6.2-all\9st6wgf78h16so49nn74lgtbb
Move to this directory and delete gradle-5.6.2-all.zip and
gradle-5.6.2 folder
Goto
https://downloads.gradle-dn.com/distributions/gradle-5.6.2-all.zip and
download the zip file Replace the .zip file with the one you had
deleted earlier and extract the folder "gradle-5.6.2" in the same
directory. I hope it will solve all your gradle-related problems.
Note: if your gradle version is different than mine, just change the
version in the link provided above to download your gradle version.

Answer 2

Ops! you said I am trying to just run the example one that comes with it:
Those apps are implemented while ago. Please first try flutter upgrade and flutter clean.
If thats not worked check if distributionUrl is http. If so change it to https. Then do gradle build.
Your gradle-wrapper.properties file should be in flutter root project android directory. In my case it is C:\flutter_app\android\gradle\wrapper.
If this does not solved may be your gradle version in file system is broken. Deleting cache directory (C:\Users\usernmae\.gradle\caches) in .gradle and gradle build or sync from Android Studio will do the trick.