The java error is coming from the client, not Standby0 or OlioWeb0.
On your client0, you need to verify that
1. You installed the correct version of STAF for your client0 operating system (Did you install 32 bit staf on a 64 bit operating system?)
and
2. That you installed the correct version of Java on client0 (correct bitness) and that you set the environment variable JAVA_HOME correctly. See instructions "Install a Java JRE" in the benchmarking guide.
To double check Java installation, open a command prompt and run java -version.