Eclipse plugin update site gives 504

Hi I'm trying to move my development from my Mac to a new Windows 10 machine.
When I try to install the eclipse plugin from
https://developer.garmin.com/downloads/connect-iq/eclipse/

... I eventually get the below error:
An error occurred while collecting items to be installed
session context was:(profile=C__eclipse_eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
HTTP Server 'Gateway Timeout': developer.garmin.com/.../IQ_IDE_3.0.3.jar
HttpComponents connection error response code 504.


I'm not using a proxy and when I browse directly to the above artifact, I get a 504 as well. It would seem as if the repository is down or misconfigured. There's no rush from my side but I felt that I should try to report the error at least.
Thanks
Erik