Do you use SP Page Builder and do you need to add left/right module in joomla page? Normally you will have an issue, all your width will be 100%, to fix this,

  1. duplicate your theme and in layouts add css class like .examp22 on row that have left/component/right save
  2. choose from menu,( where you need to have left-comp-right ) new theme
  3. in css add this code

add into your css this code:

.examp22 .sppb-row-container {width: 100% !important; }
.com-sppagebuilder #sp-main-body.examp22 {margin: 0 auto;}

@media (min-width: 768px) {
.com-sppagebuilder #sp-main-body.examp22 {max-width: 750px;}
@media (min-width: 992px) {
.com-sppagebuilder #sp-main-body.examp22 {max-width: 970px;}
@media (min-width: 1200px) {
.com-sppagebuilder #sp-main-body.examp22 {max-width: 1170px;}