I've just noticed the plotting problem with older version of RStudio Server that goes with the recent update of R to v4.1.0. I tried to upgrade my RStudio Server version, but since my server still runs Ubuntu 16.04, the latest stable and preview versions that have the problem fixed seem only available to Ubuntu 18.04 or higher. I know I'm going to upgrade my Ubuntu version sooner or later, but for now, is there a working version of RStudio Server for both R 4.1.0 and Ubuntu 16.04...? I tried v1.4.1106 but there's no luck. Thanks.