PHP Expert for Bug Fixes

My e-commerce site ( https://tinyurl.com/56j5u5n5 ) is throwing up a few headaches I’d like cleaned up quickly. On several product pages and on the contact page I’m seeing broken links and intermittent PHP error messages. The layout itself is fine, so the job is strictly about tracking down the faulty code or routing, correcting it, and confirming no new errors crop up once the fixes are deployed.

You will need to:
• review the existing PHP templates and any related routing/controller files
• repair or correctly redirect the broken internal links on the affected pages
• eliminate the current error messages so the pages load cleanly
• test across desktop and mobile to be sure every link resolves and no new warnings appear

I’ll give you access to the codebase and the live server for a quick turnaround. Once you finish, please provide a brief summary of the edits so I can keep them documented for future maintenance.