Orientdb login fails all the sudden - orientdb

Question

I've been using orientdb-2.2.19 for a while with no problem. After restarting my computer today the http://xxx.xxx.x.x:2480/studio/index.html#/ login page does not let me log into my database. The bin/server.sh command does not show any error:
GRAPH DATABASE
`` `.
`` orientdb.com
`
/hdd/orientdb-2.2.19
removing old pid file /hdd/orientdb-2.2.19/bin/orient.pid
2018-01-04 12:40:30:080 INFO Loading configuration from: /hdd/orientdb-2.2.19/config/orientdb-server-config.xml... [OServerConfigurationLoaderXml]
2018-01-04 12:40:30:250 INFO OrientDB Server v2.2.19 (build 1758205114667e967bba32d61adda4022bbad08e) is starting up... [OServer]
2018-01-04 12:40:30:253 INFO Databases directory: /hdd/orientdb-2.2.19/databases [OServer]
2018-01-04 12:40:30:297 INFO OrientDB auto-config DISKCACHE=11,969MB (heap=1,963MB direct=524,288MB os=15,980MB) [OMemoryAndLocalPaginatedEnginesInitializer]
2018-01-04 12:40:30:509 INFO Listening binary connections on 0.0.0.0:2424 (protocol v.36, socket=default) [OServerNetworkListener]
2018-01-04 12:40:30:512 INFO Listening http connections on 0.0.0.0:2480 (protocol v.10, socket=default) [OServerNetworkListener]
2018-01-04 12:40:30:519 INFO Installing dynamic plugin 'orientdb-studio-2.2.19.zip'... [OServerPluginManager]
2018-01-04 12:40:30:521 INFO ODefaultPasswordAuthenticator is active [ODefaultPasswordAuthenticator]
2018-01-04 12:40:30:522 INFO OServerConfigAuthenticator is active [OServerConfigAuthenticator]
2018-01-04 12:40:30:523 INFO OSystemUserAuthenticator is active [OSystemUserAuthenticator]
2018-01-04 12:40:30:537 INFO Installed GREMLIN language v.2.6.0 - graph.pool.max=50 [OGraphServerHandler]
2018-01-04 12:40:30:537 INFO [OVariableParser.resolveVariables] Error on resolving property: distributed [orientechnologies]
2018-01-04 12:40:30:540 WARNI Authenticated clients can execute any kind of code into the server by using the following allowed languages: [sql] [OServerSideScriptInterpreter]
2018-01-04 12:40:30:541 INFO OrientDB Studio available at http://xxx.xxx.x.x:2480/studio/index.html [OServer]
2018-01-04 12:40:30:541 INFO OrientDB Server is active v2.2.19 (build 1758205114667e967bba32d61adda4022bbad08e). [OServer]
I can log into the default "GreatfulDeadConcerts" database with the same username/password though. So I know I'm using the correct username and pass.
What could cause this problem?
On possible thing is that I copied the entire orientdb-2.2.19 folder from another directory into the one I'm using now. But this did not cause any problem for almost three weeks. So not sure if this is the real reason.
Update:
As suggested, I setup a new user and password but the login still fails. This seems to be a more serious problem than just a login issue.
I ran this command:
orientdb>CONNECT plocal:../databases/Test HUser HPass
which gave me the following error:
Error: java.lang.NumberFormatException: For input string: "public"