swarm agent failing on windows build 1909

hi - I am wondering if anyone has experienced the same problem - with versions 4.22, 4.23, and 4.24, unreal installs and works ok, but when I try to build the light, I get the message “swarm agent failed to connect” everytime - also the little black and yellow icon disappears as soon as I try to click on it - and all virus software and windows defender has been disabled.
is anyone else having this problem?

update - more testing on other machines indicates it works on 1909 - but still having mysterious disappearing swarm icon and “failed to connect” message… I know this topic has come up in the past but all posted solutions have not worked out…

Hi.did you fix it? it seems i got the same problem