Perfex CRM Data Display Issue

I'm encountering an issue with my Perfex CRM where data is not appearing in certain modules. Specifically, the leads module and the invoices module are not displaying any data. As such, I need a professional who can address this issue swiftly and restore the formerly smooth functionality of these modules. An ideal candidate for this job would have:
- Prior experience with Perfex CRM
- Proficiency in troubleshooting data inconsistencies
- A robust understanding of how CRM leads and invoice databases operate.