Hi.
I don’t know the plugin and I can’t give any direct advice about it.
My general advice is this: the last Obsidian updates (with the new “Live Preview”) are a big step forward but with many issues to polish. We can imagine that if the app is not yet stable in new features, the plugins much less. Both things need time.
So, if you want to work with things as usual (more than use the new obsidian features), go to Settings > Editor and enable “Use legacy editor”. Restart the app and try your plugin.
Boas Festas