gallery landing page not loading

[deepdata]

hi 

I am alteryx admin, 
one user are unable to load gallery page getting an error message " can't reach this page" as shown in attached picture. while i can load the same gallery on my system. one day ago I did alteryx service restart and need to kill some jobs to do restart fast.

now I am facing this issue, its new to me, how to sort it out.

thank you in advance

[deepdata]

hey
it can be DNS resolution problems issue?