Install failed: Validation Failed

the title is the error (
Install failed: Validation Failed)
how do i fix this?

 

I have the same exact issue installing the 2018.* editor

 

Quit the Unity Hub from the icon tray (the thing bottom right) and relaunch the Unity Hub as administrator.
This is apparently an issue with the new hub beta. Someone shared this solution in the "Share your Unity Hub 3.0 Beta Feedback Here" thread.

It worked for me, if it doesn't work for you close it from the task manager and try opening it as admin again. If the error persists, maybe there's some hope in the official thread I posted right there!

 

Thanks @RogerFK this fixed the issue for me!

 

Thanks @RogerFK, that was a big help!

 

Thanks @RogerFK,

 

Omg, this is not fixed yet...
Thanks @RogerFK

 

Any updates on this? Just tried installing 2020.3.18 using Unity Hub 3.0.0-beta.4 and it fails to install Documentation, Android Build Support, and OpenJDK with all failing with the same "Install failed: Validation Failed" error message. Tried running Unity Hub as administrator as suggested, but no luck.

 

Running into the same issue on mac. This is the first result that pops up from Google.

 

I wound up going back to Unity Hub v2.4.5 and the install went fine. I'm guessing the issue is only in the v3 beta.

 

I had this issue with the new hub, then went back to 2.4.5 where it worked for a day and the next day something corrupted and it wouldnt open so I wanted to reinstall it and now Im getting the same problem with the old hub?

 

@RogerFK goated

 

Same here.

 

run unity hub as admin is the key

 

Woah fixed for me. What a dumb issue ngl

 

Thanks @RogerFK , it worked for me

 

I've just spent the last couple of days trying to solve this (technically finding out that the Android SDK/NDK and OpenJDK weren't installed). I found this thread tonight and I tried running Hub as Administrator, but that didn't work for me.

The only Antivirus I have running on my machine is Windows Defender. I tried disabling that and it didn't work either.

It was only after I had temporarily disabled UAC and ran the install that I was able to install the SDK/NDK/JDK to run the Unity install then ran the install. The install went through fine. Set UAC to what I had it at before (one down from the top) and Unity is running fine and not reporting that and of the Android SDK's are missing.

In theory, I thought the run as administrator should have done the same as what I did with UAC..

 

How do you do that?

 

Thanks @RogerFK , it works!

 

On the mac the problem for me was, that the folder was not writable. I changed the owner of the directory to my user and the installtion worked.

For me it was:
sudo chown mike:wheel /Applications/Unity/Hub/Editor

 

Good call. In my case I had to also create the "Hub" and "Editor" folders, but this was the issue on Mac for sure.

 

I'm on M1 pro Mac and this thing helped me. Thank you so much!

 

In my case I had migrated from an older mac to a new M1 mac and for some reason I didn't have permissions to write in the Applications folder, although i was logged in as admin... go figure...

 

my man

 

Bro i got you

here i found a fix for it!

 

I AM SICK TO MY STOMACH WITH THIS. I'm on my Mac and I've tried everything, from changing the download paths, changing editors, adding on the failing android modules, trying to install a whole new editor from scratch. I've changed file permissions. Nothing is working.

 

I lost half today because of this. I was installing the android module and NDK download failed. I had to cancel it but then Hub (beta) was saying the module was installed. There's no way to uninstall a module, so I had to uninstall Unity. Sadly I had it open, so it didn't delete the install folder.
I proceded to install it again but this error appeared. I canceled and re-downloaded. Error again. Fortunately it came to mind that I had unity open while I uninstalled it and I went to look for the install folder, found it, deleted it and pressed the retry button. Now it's installing it.

Install folder path: C:\Program Files\Unity\Hub\Editor\2021.2.7f1 Look for it's last accessed/modified date to be sure it's before you launched the install, and delete it.

I hope this will help someone.

Moral of the story: Hub shouldn't allow to modify a unity install if it's open.

 

For me, the case I was using VPN, when I disabled it, the download worked fine

 

Thank you! It's work for me!

 

I ran into this issue with Unity Hub 3.0.0, installing Editor 2020.3.26f1 on macOS 12.1.

Manually creating the /Applications/Unity folder fixed the issue in my case. It was a fresh install so the folder didn't exist. I was running as a standard user instead of an administrator (I suspect that's what caused the issue).

 

Exiting from task manager and launching as admin worked for me, tyvm

 

In my case this was a mistake with the 'new Apple option "Private Relay (Beta)"'. Disable it and the download will working. If you running PfSense with Snort, check the log for blocking of the JAVA download. Disable the rule (SID 17459) temporary.

 

Worked for me as well, thanks. Unity Hub and a bunch of Unity Editors was installed under another user(that doesn't exist anymore). Changing owner of a folder helped.

 

I just close the Unity hub and i reestart the program i use adm

 

In my case too. Thank you.

 

I deleted unity hub download temp folders in this location:

C:\Users\<username>\AppData\Local\Temp\unityhub-xxxx-xxx-...

then restarted computer and ran unity as administrator and problem fixed.

 

Thank you. It works for me.

 

Thank you! Also had to create the folders Hub/Editor in the Unity folder … (Unity Hub 3.1.1)

 

Helps a lot! Thanks!

 

Getting this in 2022. The new hub is SUCH a pain!
If I was the product owner I'd recommend some more (user) testing and additional UX designers on the team

 

Check to make sure your ins tall location is in a place that is not encrypted or on an absent external drive

 

Check to make sure your ins tall location is in a place that is not encrypted or on an absent external drive

 

For future people also using a Mac: If you have this folder existing from previous installations, The Applications/Unity Folder, Applications/Unity/Hub folder, and Applications/Unity/Hub/Editor folder will all three need to have their permission set for the intended user. Even if said user is the administrator.

For good measure I also did the same to UnityHub application itself, though that may have been excessive.

 

Run in admin don't work but VPN solution suits me

 

Same exact thing happens for me im on a macbook air and I wanted to finally do something with my life and learn unity but INSTALL FAILED VALIDATION FAILEDFAIWEDFJAOIEWJFPIUO3HRPGOIEHAFDJPOIWRLSDJFK I'm just really sad that it still hasn't been fixed. even on the older versions.

 

omgomgomg I figured it out
on mac
do not use the default folders for the installation make new folders in like documents or something set both file areas to the same folder and then install. thats it I cant believe it worked and im so happy dsfijIDJSOPFAIJSPDOFIAJPSODIFJsdjfaoisdjf;aoskdjfpiowiohpxaoi3984yterugijdk

 

I fixed it on mac!

1. open Terminal
2. cd ~/Applications
3. sudo chmod -R 777 Unity
then it worked.

My unity hub version: 3.1.1-c1

 

Thanks. It works for me.

 

I'm using Unity Hub 3.1.2 on a M1 MacBook Pro. Disabling "Private Relay (Beta)" fixed it for me. After disabling, I closed all Unity instances and reopened Hub to make sure any network settings changes would kick in.

You shouldn't have to install it in a different folder.

Granting full access to directories in /Applications is probably not a good idea.

 

Nope I tries using a VPN reinstalling and Running as Admin nothing pls help