Bookly Plugin and WooCommerce Issue (Word Press)

Hi there, We’re currently experiencing 2 issues with our ecommerce platform. We use a booking plugin called Bookly which works with WooCommerce. We’ve been using it for over a year with very few issues. But recently we noticed some problems. Internal error at checkout when someone tries to make a purchase & Woocommerce and bookly notification emails not being sent Fatal error message in about half of our old orders Issue #1 started happening after we updated wordpress, woocommerce and bookly. Issue #2 was already there and was why we updated wordpress, wc and bookly. Note: we have a backup of the site that was made before updating it. Here is the full description of what's happening: [login to view URL] I'd like to work with someone that has: - extensive wordpress admin experience - extensive woo commerce experience - extensive plugin modification/troubleshooting experience If you're familiar with the Bookly plugin, that would be great! I'd also prefer developers who naturally work locally, and test, and are used to documenting the work they do.