FFTempl Error!

/home/fuxoft/work/web/fuxoft.cz/vyplody/matix/serialize.lua:51: Cannot execute datafile: /home/fuxoft/appdata/matix/users/demo.lua:7: '' expected near '='
stack traceback:
	/home/fuxoft/work/web/fuxoft.cz/.fftempl/fftempl.cgi:30: in function 
	[C]: in function 'error'
	/home/fuxoft/work/web/fuxoft.cz/vyplody/matix/serialize.lua:51: in function 'load'
	/home/fuxoft/work/web/fuxoft.cz/vyplody/matix/main.lua:37: in function 'init'
	/home/fuxoft/work/web/fuxoft.cz/vyplody/matix/main.lua:810: in main chunk
	[C]: in function 'dofile'
	[string "--LUASCRIPT..."]:3: in function 'compiledcode'
	fftempl_core.lua:174: in function 
	[C]: in function 'dofile'
	/home/fuxoft/work/web/fuxoft.cz/.fftempl/fftempl.cgi:40: in function 
	[C]: in function 'xpcall'
	/home/fuxoft/work/web/fuxoft.cz/.fftempl/fftempl.cgi:48: in function 'fftempl_main'
	/home/fuxoft/work/web/fuxoft.cz/.fftempl/fftempl.cgi:69: in main chunk
	[C]: at 0x55bd133562e0

FFTEMPL DEBUG OUTPUT FOLLOWS:

No debug text! (You can log debug messages yourself by calling FFTEMPL.log() function)