Moved to help for not following the bug report template.
If you post in help, you see this template. Have you tried these debugging/troubleshooting steps yet?
First, search the help docs and this forum. Maybe your question has been answered! The debugging steps can help, too. Still stuck? Delete this line and proceed.
Make sure to redownload Obsidian to get the latest installer. And update any plugins and themes. Test in the Sandbox vault, etc. etc.