Update Concrete5

From the dashboard, Systems & Settings, Backup & Restore, Update concrete5 when I click on Update Concrete5 I get:
HTTP 500 error
That’s odd... the website can’t display this page
The site may be under maintenance or could have a programming error.
Try this
Go back to the last page
Try contacting the website’s owner

I am currently using:
# concrete5 Version
Core Version -
Version Installed -
Database Version - 20160615000000

View Replies:
jero replied on at Permalink Reply
A 500 error indicates that something's not right with the server itself. Either there's a PHP problem, a configuration problem or a permission problem. You're going to need to find your server error logs and have a look through them to discover exactly what the issue is.