jumbo wrote: Issue is the same there. "webpage is not available" once a respondent clicks "next".

How can you reproduce that issue? Did you try to reproduce it with limeservice on a PC /Browser outside your callcenter ?
How many callcenter agents are using the limesurvey survey concurrently?
Can you tell us something about the survey in terms of amount of questions?

Hi, Jelo. I did export/import. I exported survey form local installation and imported into limeservice.com. Issue comes up when more than two agents are logged in. There are around 60 q's some of them are rating.