slesar
15
Overall problem is Adguard home config.yaml which not match version Adguard home after upgrade firmware.
You could do what @admon made script.
Or cut file config.yaml and open page looks like installation Adguard home. Fill random, upgrade Adguard home. Turn off Adguard home, delete generated new file config.yaml and paste your config.yaml. should be work if you did upgraded Adguard home before.