Error

[NoBodyButMe]

Hello

When I try to use Cassius to create an online "paper", Firefox and Chrome return "errors". They do not "remove" the unnecessary pages and do not add pagenumbers at the bottom of the page.

Uncaught DOMException: Failed to execute 'matches' on 'Element': 'html, body, h1, h2, h3, h4. h5, h6, p, table, blockquote' is not a valid selector.
at visit (https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:2385:50)
at Object.findAllMatchingRules [as findAllMatchingRulesWithPseudo] (https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:2413:5)
at Object.findAllMatchingRules (https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:2331:16)
at visit (https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:4461:89)
at Object.copyStyle (https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:4584:4)
at NamedFlow.module.exports.cssRegions.Flow.generateContentFragment (https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:4832:24)
at NamedFlow.module.exports.cssRegions.Flow._relayout (https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:4959:31)
at https://www.schoolvoorbeeld.be/nodig/cassius/cassius/regions/css-regions-polyfill.js:4888:43