Forogramero
This is fixed in Scribe 1.0.2 — thank you for the console trace, that's what identified it.
The cause was on my side. Flarum's built-in editor exposes a <textarea>, and other extensions read .value off it and listen for input events. Scribe replaces that with a rich-text element, so anything relying on the old shape got undefined — MagicRead's character counter was calling .value.length on every keystroke, which is where your counter.ts:58 errors came from. Because those listeners weren't isolated, that one error also stopped the toolbar updating and cascaded into the editor itself, which is why it looked so broken.
Scribe now keeps that contract, and misbehaving listeners can't take the editor down. composer update ernestdefoe/scribe and clear the cache. Please let me know if anything still looks off on mobile.