Hi
I found the solution
templates/jsmallv2/css/bootstrap.min.css
I edited width of the field
input-group>.form-control{position:relative;-ms-flex:1 1 auto;flex:1 1 auto;width:1%;margin-bottom:0}.input-group>.custom-file:focus,.input-group>
Changed to
input-group>.form-control{position:relative;-ms-flex:1 1 auto;flex:1 1 auto;width:
100%
;margin-bottom:0}.input-group>.custom-file:focus,.input-group>