I'm having trouble with chat within vscode after configuring Tabby behind nginx reverse proxy. The Tabby web interface works fine, and the server test returns a 200 status code. However, the 'chat playground' from the Tabby home page and vscode chat are not working. When clicking on the chat tab within vscode, I get an 'Application error: a client-side exception has occurred' message. How can I troubleshoot this issue?