We're looking closely into this issue right now. Hopefully we can resolve it tonight. Sorry for the delay.

I see outdated glue records on limequery.org. That can lead to wrong nameservers. Might not be the only issue, but that should be fixed.

Replace the glue records (which are set via the domain registry not your nameserver).
ns1.limesurvey.org is currently set to 136.243.106.133 instead of 167.235.201.250.
ns2.limesurvey.org is currently set to 145.239.7.156 instead of 5.161.47.82.

Yeah, we're looking at this, jelo, thanks. It's a bit problematic since it can take some hours for the change to be propagated.

For me it is the same: eudemos.limequery.com/admin cannot be found. It is not a local internet problem, as I can access this forum.
It seems, that the domain is not listed in the nameserver??

I can see that site from Canada.

From Germany, too