Problem with national characters

Hello, I'm using LaTeX editor from time to time, but unfortunately I'm unable to use national characters. In

\text{}

statement are visible Latin letters only. For example

\text{Zażółć gęślą jaźń}

looks: ("Za g l ja")

Thanks for help in advance.

Unfortunately, we recently had to enhance security on the rendering engine, because we identified a means to crash it using Unicode characters. Once we resolve the issue then we'll revert to the previous settings that includes all the characters you have listed.

Ok. Thank you for your answer.