Problem in gulp-browser not finding sass file?

Question

Sass

Dear gurus!
When changing in app.sass, browserSync does not reload the page and says that it cannot find the file in this path, but it is there!!!

Error: src\style\main.sass
Error: File to import not found or unreadable: ./partials/app.sass.
        on line 10 of src/style/main.sass
>> @import "./partials/app.sass";

Question for the experts!!!
Where is the problem?!

spoiler

$fonts: Verdana, sans-serif
$dark: #293947
$gray: #8c9d9d
$escape: #e03e38
html,body,h1
border: 0
padding: 0
margin: 0
font-family: $fonts
font-size: 10px
a
outline: none
text-decoration: none
color: $gray
font-size: 1em
.nav-box
display: grid
grid-template-columns: 128px auto 250px
background: $dark
position: fixed
width: 100vw
box-shadow: 1px 1px 5px #000000
.nav-box__contacts
align-self: center
.nav-box__callBackBtn,.nav-box__logo
align-self: center
justify-self: center
.contacts-box
display: grid
grid-template-columns: repeat(3,1fr)
list-style-type: none
text-align: center
margin: 0
padding: 0
.contacts-box__item
font-size: 2em
.contacts-box__item>i
color: #ffffff
font-weight: bold
font-size: 1.2em
.nav-box__callBackBtn__btm
border: 0
border-radius: 0
padding: 25px
font-size: 1.5em
text-transform: uppercase
font-weight: bold
color: #ffffff
background: $escape
cursor: pointer
&:hover
background: lighten($escape,15%)
&:focus
outline: none
.form-box
display: grid
grid-template-colomns: repeat(4,1fr)
.hidden
display: none

Answer 1

Decided! Add to sablimeText in user settings "atomic_save": true
AND REJOICE!!!!