Missing Semicolon

O que causa este erro

Each CSS property-value pair must end with a semicolon (except the last one before a closing brace). A missing semicolon causes the next declaration to be parsed as part of the current value.

Como corrigir

Add semicolons after each property declaration. Use a CSS linter to catch missing semicolons. Most editors can auto-format CSS with proper semicolons.

div { color: red
  font-size: 16px; }