CSS breaks Designer for ordered lists

Would you know why the following would cause the error: NotFoundError: Node was not found.

ol ol {
padding-left: 10px;
}

ol ol ol {
    padding-left: 10px;
}

ol li {
	display: table;
counter-increment: section;
margin-bottom: 0.6em;
}

ol li::before {
	display: table-cell;
	content: counters(section, ".") ". ";
    padding-right: 0.6em;
}

I tried your CSS in PReS Connect 2018.2.1 and didn’t get any error message.

Have you solved your issue?

Hi, it was caused by a repeating issue.
Sorted now. Thanks.