Attempting to login to the dashboard. crashes1 user found helpful
Zend \ Http \ Client \ Adapter \ Exception \ TimeoutException (1000)
To change this manually go to application/config/generated_overrides/concrete.php and around line 19 you should see
'login_redirect' => 'DESKTOP',
Change it to...
'login_redirect' => 'HOMEPAGE',
Just ignore the message at the top of this page that states 'DO NOT EDIT THIS FILE DIRECTLY' since you are able to amend it in the dashboard.
I also in my failed attempts of fixing the issue, I deleted my project and thinking I could reconnect, however when looking to do that it's not showing up in the add functionality
The trick is... Don't try to get addons and themes through the dashboard, instead get them from
download them to your PC and add them manually to your Packages folder, then you will find them ready to install when you visit the 'Add Functionality' page.
It could be that your site's connection to your concrete5.org account is not configured correctly.
If you can't get that sorted out, @concreteOwl's suggestion is the way round it.