Hey there,

I am really sorry for the delay of this reply as it is a weekend for us here.

Actually that column width is controlled by the Easysocial CSS, so you can try apply following CSS into your site backend > Easysocial > theme > custom css and see how it goes.

body #es .es-container .es-sidebar {

    width: 260px !important;

}

hi, I just installed version 3.0.5.
now what parameters should I change in the css? I noticed that the position names have changed. thank you

You can try this and see how it goes.

body #es .es-container .es-container__sidebar {

     width: 260px;

     flex: 0 0 260px;

     -webkit-flex: 0 0 260px;

}