Question: I installed Magento 2 on Ubuntu 14.04, and tried to examine whether anything I need to update in Magento system.

I enter "Web Setup Wizard" from admin panel, but it shows the error message at the first step.

> 
> "Sorry, we can't take that action right now."
> 
> 
> 

I have tried to find the solution in the official document, but nothing is found.

[![enter image description here](https://i.stack.imgur.com/rRvXD.jpg)](https://i.stack.imgur.com/rRvXD.jpg)

Answer: 
The error message comes from `setup/view/magento/setup/select-version.phtml` and is displayed if the value of the variable `upgradeProcessed` is `false`.  

The variable is set in `setup/pub/magento/setup/select-version.js`.  

Initially this is set to `false` and it is set to true if there is a success response from the url `index.php/select-version/systemPackage`.  

This url is mapped to `setup/src/Magento/Setup/Controller/SelectVersion.php` and `systemPackageAction`.  

So I guess something goes wrong in here.  

I have no idea what, but this is a great place to start debugging.
Most of the time, the problem is caused by the fact that you're not authenticated.

But sometimes, it's caused by the fact that you installed Magento 2 by cloning the GitHub repository.

In that case, you cannot use the Web Setup Wizard and have to run the following commands:

```
git pull origin
composer update

```

More details can be found here: <http://devdocs.magento.com/guides/v2.0/comp-mgr/trouble/cman/were-sorry.html>