Obsidian 1.8.3 was just released today. Maybe one of your plugins is uphappy with the update. You could try
updating your plugins
disabling your plugins. If that solves your issue, enable them one-by-one until something fails so you can identify the offending plugin.
you might need to rebuild your vault cache. (Settings → Files and links → Rebuild vault cache)
you might try moving your .obsidian folder someplace out of your vault and seeing if things start working. If so, it’s something in your vault configuration.
Just some stuff I’d try if I was in your position.