Population estimates with SEDAC global map

[derekmuir]

I am able to enter the lat/long coordinates on the SEDAC global map
https://sedac.ciesin.columbia.edu/mapping/popest/pes-v3/
to get population within a radius of that point it generates only an error message - says service is unavailable.
I have previously used this service quite a lot and it worked well eg recent paper relating population density to contaminants in water DOI: 10.1021/acs.est.3c01866
Suggestions for a work around would be appreciated