I got this error when registering new enrollment. It is happened just after midnight after scheduled analytic run time. Before that no problem for creating and saving TEI.
and strange thing is it was only happened to my computer, my colleague from other country could create TEI without having same problem. And then enrollment error was also happened to other two instances when I tried to open from my laptop, but not showing this error summary, only show that failed to save the server.
DHIS2 version: 2.33.4