Error message between header and first section on mobile version only

Hi,

In between my header and first section below the following error message shows - on the mobile version only (no sign of it on desktop):

The full thing reads: 

#block-yui_3_17_2_1_1601758406282_13090 [class*=sqs-block-button-container] { text-align: right; } #block-yui_3_17_2_1_1604881259521_14605 [class*=sqs-block-button-container] { text-align: left; } #block-716e51162c1b56bda8c3 + .row > .span-6 { width: 50% !important; float: left !important; }

What does this mean and how can I correct/get rid of it?

Any advice greatly received! Thanks.

Settings > Advanced > Code Injection  Or Home Page Header (Hover homepage on Main Navigation or Not Linked > Click Gear Icon > Advanced) >> Find above code & remove it.

Thank you so much Tuanphan - problem solved!

Very much appreciated 🙂