Fix Dropdown Issue in Excel -- 2

I'm seeking an experienced Excel developer to diagnose and resolve an issue with drop-down menus not functioning on certain computers.

Requirements:
- Expertise in Excel, particularly with .xlsx files
- Knowledgeable in Excel macros and scripts
- Ability to troubleshoot across different environments (browsers and systems)

Ideal Skills:
- Excel VBA proficiency
- Strong problem-solving skills
- Experience with cross-platform compatibility issues

Please provide a brief overview of your experience with similar issues.