Indeed the problem came from the server. All fixed now. You can access illustrate either from cellpaint or directly through our web page : https://ccsb.scripps.edu/illustrate/. We also have a development version you can play with here https://mesoscope.scripps.edu/beta/cellPAINT_dev/. It has better performance.
The web app have been fixed according the unity forum. "find a line with this text, "p = /Mac OS X (10[._\d]+)/.exec(i)[1];", change it to "p = /Mac OS X (1[._\d][._\d]+)/.exec(i)[1];"
Good catch, actually known from unity https://forum.unity.com/threads/bug-generated-unityloader-js-fails-in-ios-14-public-beta.942484/ I will check if its still the case and fix it otherwise. Ludo