VMWare Specialist for VMWare machine Diagnosis

My VM environment is currently experiencing difficulties, with one VM, specifically a database server running SQL Server, functioning but with inaccessible state.

Skills & Experience:
- Comprehensive understanding of VMWare environments

Your main task will be to:
- Identify the root cause of the issue
- Recommend solutions to restore the VM back to optimal function

Please note, extensive previous experience with VMWare is an absolute must. I need an expert who can navigate and remediate this issue swiftly.