1_First optain the correct Grafana home path using:
ps axuf|grep grafana - to make sure we are using the correct Grafana homepath
2_Open the Grafana logs - C:\tibco\ftl\6.7\monitoring\grafana\data\log To understand why its failing
3_Please note the following:
After updating the password using grafana command, the account gets locked for 5 mins. Only after this time, you should to attempt to connect using the new password. So, after resetting the password, kindly wait for 5 min and connect again with the new password.