Layout Block Options

Woke up this morning to find that I can no longer access block options in the layouts.

Clicking on the block options "gear" brings up the spinner and never resolves.

I see a single error in the console related to the smarty console

TypeError: (null is not an object (evaluating '_smarty_console.document')

Not sure if this is normal or not.

I have resolved. Thanks.

What was issue and how did you resolve please?

Unsure of how the issue was introduced, but I rebuilt templates and it resolved.