Live preview problem

How do I resolve this problem ?
Live Preview Server screen:
07.05.2021 12:36:44: Compiled Successfully
07.05.2021 12:36:44: Error during compilation
07.05.2021 12:36:44: Compilation aborted
07.05.2021 12:36:44: E:\PROJECTS\Template UI\TMSWeb_TemplateUI.dpr (5, 1) Error: can't find unit "System"
07.05.2021 12:36:44: Pas2JS Compiler version 2.0.6 [2021/04/23] for Win32 i386
07.05.2021 12:36:44: Command line: pas2js.exe "E:\PROJECTS\Template UI\TMSWeb_TemplateUI.dpr" -MDelphi -l -JeJSON -JRnone -O- -JUpju -viw -vnh -vm026,5024,3021,5023,4501 -Jitms.js -Jirtl.js "-FUE:\PROJECTS\Template UI\TMSWeb\Debug-Unit1" -vb -dHOTRELOAD -dLIVEPREVIEW -dLIVESERVER -dWEBLIB
07.05.2021 12:36:44: Preprocessor: E:\PROJECTS\Template UI\Unit1.pas

Does this project compile & run?

Yes it does.

image001.jpg

We could see an issue and applied a fix that will be included in the next update.