I can't make a new Unity Project - unity3d

I have an error with creating a project with unity Hub (Editor 2021.2.9)
Here is the error message:
Could not find Unity Package Manager local server application at [/Applications/Unity/Hub/Editor/2021.2.9f1/Unity.app/Contents/Resources/PackageManager/Server/UnityPackageManager]. Missing files could be the result of an antivirus action or a corrupt Unity installation.
I tried to look it up but I don't have a Unity.app folder.
How do I get it? I tried to reinstall it and still there is nothing there.
I'm on a MacBook M1.
I appreciate any help.

Try to turn off antivirus and reinstall it again

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Unity 3d error while opening the editor. Probably an error in the package manager

I am facing a problem with unity 3d editor. The issue is in both the versions of the Editor that I have downloaded being 2021 version and 2019.4 version. It occurs whenever I create and load up a new project in the unity editor.I have made no changes in the script or the scene so it is probably a problem with the packages. The module I have downloaded is the android build support and windows build support. Moreover I do not get any error message. I am attaching a screenshot. Please check the screenshot and please see what is the problem. Please help is you can. I will be very thankfulPlease see the picture and Help

Unity - Bug in Unity Hub : Unity is already in list. You cannot locate the same version

When I launch a project via Unity Hub, the following message is printed : Unity is already in list. You cannot locate the same version.
unity hub error
And when I want to access my project via Assets -> Scenes.
I get this : error message
If I said "continue", my project is broken with a lot of errors to fix.
Have you a solution ?
Thanks
From what I see in your screenshot, you are trying to open a project with an older unity version than the project's version. As it is written in the message, the operation is not supported and you should open it with at least the same version, or an older one. Make sure you have such a version installed in Unity Hub and to open the scene with this version.
You can still try to get everything to work by reimporting all you assets in Assets -> Reimport All but this will probably fail.

how to switch platforms in unity?

hiii i am new to unity, and i want to switch my platform to android. but, the problem is, when i click the android in build settings, it says "no android module loaded". and when i click to install with unity hub, it says "the unity version 2019.4.13f1 is already located by the hub. You cannot add modules to a located hub". how to resolve this issue ?? and i have also tried installing unity installer and when the downloading completes, it says "failed to locate unity.exe".... can someone pls help me with this.. I am trying this since past few days, and it has become annoying :(.. plssss somebody helpp.....
You should try this post:
Can't add modules to installed Unity editors
It says no reinstall required. But I would try that next.
It cannot hurt to read this as well:
https://docs.unity3d.com/Manual/android-sdksetup.html

Unity not loading project if internet is enabled

My computer crashed and since then it has not been opening properly Unity Editor and my projects
Since i have updated unity several times i decided it was time to make a fresh instalation so i uninstalled Unity and Visual Studio, deleted all the unity folders on AppData, and Program Files, then i reinstalled unity 2018.2.5 and Visual Studio
but for some reason it wont load any project nor it will create any new project if my internet connection is enabled, i need to disconnect my computer, launch my unity project, wait for it to load then re enable my internet connection
Any ideas on how to fix this?
Regards...
The issue is likely related to licensing. I recommend checking out Unity's documentation on managing your license.
For starters, try the following once you have Unity running:
Click the Unity drop-down on your toolbar (Help on Windows OS).
Click the Manage License option.
Select "Check for Updates."
You can also try the "Active New License" option.
One way to fix this that worked for me is to uninstall and reinstall unity hub, then create a new project and then try to open it. It should work then.

Weaver failure: unable to locate assemblies (no matching project) for: Temp/Assembly-CSharp.dll

I opened Unity for the first time in a while today and I'm unable to create new scripts of any type. Both the normal and right click menus are missing the option:
Adding a script through the inspector creates a file, but yields these errors:
Although the file is created, it does not appear in either the project browser, or inspector panels.
Googling various parts of these errors actually gets a lot of posts, but almost all of them come down to "restart Unity", which isn't doing anything.
All of this is reproducible for me on a fresh project file. I've tried restarting Unity and my computer, as well as reinstalling Unity from scratch. I've also double checked that I have .NET installed properly (reinstalled, and dotnet command works in terminal).
Unity: 5.4.5p5
Mac OS 10.13.3
This is a bug present in versions between Unity 5.1 and 5.4. It has been fixed in Unity 5.5.0 and an update to 5.5.0 and above should fix it.
If updating to Unity 5.5.0 which has the fix did not fix it then it's better to upgrade Unity to the latest version which is currently Unity 2017.4 at the time of posting this answer. This version should be able to get ride of that error.