I recently upgraded our Suprema Biostar 2 access-control server and have been unable to reach the dashboard ever since. The login landing page appears, but once I enter valid credentials the system just refreshes to the same page—no error banner, no dashboard load. In other words, the problem happens right at the “Loading the dashboard” step. What I need from you • Identify the root cause of the post-upgrade login loop (web service, DB link, certificate, or any mis-matched module). • Apply or guide me through a corrective fix so the dashboard loads normally. • Provide a short note outlining what changed and any preventive steps for future upgrades. The environment is a standard Biostar 2 installation on Windows Server with the default MariaDB bundle; remote access can be arranged via AnyDesk or similar once an NDA is in place. If you have hands-on experience with Biostar 2 or similar access-control platforms and can resolve this promptly, let’s get started.