Fix 403 Forbidden WordPress Site

My site https://bandanasypaliacates.com/ has gone down with a “403 Forbidden – Server unable to read .htaccess” message. I have not touched any core files or settings recently, and I do have full access to the IONOS Control Panel... (Budget: $10 - $30 USD, Jobs: Database Management, MySQL, PHP, Web Development, Web Security, Website Management, Website Optimization, WordPress)