D4Science Infrastructure

Hello, I am having trouble getting Rstudio to launch for both the IOTC_SS3 VRE (http://ip-90-147-166-173.ct1.garrservices.it/) and the ICCAT-BFT-E VRE (http://rstudio.d4science.org/). Both Rstudio sessions either don't launch at all (showing just the continuous turning dial indicating that it's loading), or the message that 'Rstudio is taking longer than expected' with the choice of either Terminate Rstudio or Keep Waiting. I've been having these problems consistently, with Rstudio sometimes loading in the end, but often it will taking hours to do so. I'd appreciate any help you can give. Thanks very much.