My Magento shop at https://usefannit.com/shop has begun acting up and is losing sales because of it. The two pain-points are: • Customers get stuck during checkout and abandon their carts. • Intermittent page load errors stall the browsing experience. I need an experienced Magento developer to dig into the codebase, pinpoint the root causes, and deliver clean, well-documented fixes. Once the immediate bugs are resolved, I’d like you to stay available for short follow-up support sessions if any related issues surface. Deliverables 1. Stable, fully tested checkout flow (all payment and shipping steps complete without error). 2. Consistently fast page loads with no 500/404 responses or front-end resource errors. 3. Brief technical report outlining what was wrong, what was changed, and how to roll back if ever needed. You’ll have SSH and admin access to a staging clone so production remains untouched until the patches are confirmed. If you’ve dealt with similar Magento core or extension conflicts before, let me know—your troubleshooting approach will help me decide quickly.