Can someone translate this TypeError: cannot read property '0' of....

Author: ec_sjtu, Created: 2021-08-17 11:59:12, Updated:

TypeError: cannot read property ‘0’ of undefined at <anonymous> (FILE:681) at run_formula (FILE:931) at <anonymous> (FILE:1135) at forEach (native) at <anonymous> (FILE:1137) at forEach (native) at run_MyLanguage (FILE:1138) at main (FILE:2192)


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The grassThe data should not have been accessed, specifically what exchange, where the server is.