Error in LESS file

Question

I am getting this error while running the deploy command. What is the issue? Please help me. My code is

.fieldset {
                .field {
                    &:not(.choice) {
                        .label {
                            font-family: "Gotham-Medium", sans-serif;
                            font-weight: 500;
                            font-size: 18px;
                        }
                    }
                }
            }

Answer 1

First solution

before line 2654 check all brackets

Second solution

&:not(.choice) issue is here please check this in inspect element.

.fieldset > .field:not(.choice) > .label

I hope it's help.