I upgraded to WPMUDEV Dashboard v4.0.4 on a multisite installation and I now cannot access the admin section of the website. I am effectively locked out of the network.
Message: "Gateway Time-out The gateway did not receive a timely response from the upstream server or application."
I applied the same plugin update to a second multisite network and I get the exact same error.
I ensured the auto update feature was turned off, as advised, before installing the update.
Thanks in advance,