Running gatsby build gives the following error:

error Building static HTML failed
  15 |  * True if the custom elements polyfill is in use.
  16 |  */
> 17 | export const isCEPolyfill = window.customElements !== undefined &&
     |        ^
  18 |     window.customElements.polyfillWrapFlushCallback !==
  19 |         undefined;
  20 | /**


  WebpackError: ReferenceError: windo

The repository should contain a LICENSE file containing CC BY-SA 4.0 and it should be added to the Github repository metadata.

• Add custom guides on the artboard
• Make sure there is empty pasteboard space between the artboard and the toolbox
• Drag anything from the toolbx
  While dragging the new element, the artboard gets de-selected and all custom guides are hidden