Nseserv doesn't start

since yesterday one of my remote scanners has lost connection to the console. The nseserv.exe process doesn’t run. A reboot of the (Windows) machine doesn’t solve the problem.
Starting the nseserv.bat interactive shows this error:

Validating jre in directory _jvm1.8.0_332
Error: Did not find a valid jvm.
The directory name is invalid.
'timeout' is not recognized as an internal or external command,
operable program or batch file.
Nexpose Scan Engine continued with code 267
A subdirectory or file .DLLCACHE already exists.

Any hints how to troubleshoot/solve this problem ?