Have you deployed this build? Encountered an issue not covered here? Reach out in the ZKTeco community forums or consult your regional partner. Stay tuned for the upcoming 9.0.4 build, slated for Q1 2025, which promises REST API v2 and real-time WebSocket push for third-party integrations.
| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | “Failed to connect to database” | SQL Server not running or TCP/IP disabled | Enable TCP/IP in SQL Server Configuration Manager | | “Device not responding” | Firewall blocking port 4370 | Add inbound rule for port 4370 (TCP/UDP) | | “Missing MSVCP140.dll” | Missing Visual C++ Redistributable | Install VC++ 2015-2022 Redistributable | | “License file invalid” | Hardware ID changed (e.g., new network card) | Contact ZKTeco support to re-host license | | “Reports show wrong time zone” | Windows time zone not set correctly | Sync with pool.ntp.org and restart ZKBioTime service | ZKBioTime 9.0.3 Build-20241022.exe