Enthuware

Cannot use 'var' on variable without initializer. In other words, a var declaration must assign a value to the variable.

var also cannot be declare as instance field

Enhanced explanation to include this point as well.
thank you for your feedback!

Unfortunately, the description for the answer 1 "var s;" hasn´t enhanced yet.

It is still "Cannot use 'var' on variable without initializer. In other words, a var declaration must assign a value to the variable."
--> But should contains the comment, that var can´t be used for instance variables at all

Where you are looking? I just checked the explanation and it is there.
Also, please update your question bank to v 1.53.