Gulp throws an error when I write @import what to do?

Question

css

In general, I created several sass files and start doing an import into one, for which he starts scolding me.
I tried to prescribe the extension and change the quotes, I already want to freak out and return to the usual css.
Help, I've been suffering for 2 days!
in the screenshot there is the gulp file itself and all kinds of errors when I work in a certain sass file

Answer 1

It would be easier for everyone to deal with the issue if instead of screenshots you would provide code in <code> blocks.
Yours _header.sassuses variables that are defined in _variables.sass, which is included in the main file before including _variables.sass.
That is, you use variables before they are declared.