When I attempt to upgrade from 3.9.19 to 3.9.20 I am getting the following error after about 2 - 3 minutes after clicking 'update'.
504 Gateway Time-out
The server didn't respond in time.
This is also happening whenever I try to update the Joomla 'Installer - Install from Web' plugin.
Any idea why this would be and what I can do to resolve it? Is it an issue on my web server as opposed to Joomla itself?