If the problem come from the first back-slash missing, then you will need to reconfigure the LibreSoure package.
To do so, follow the coming steps:
- Edit the libresource configuration file. (should be something like ls-configxxxx.properties)
- Fix the file path in that file. use / instead of back-slash or put 2 back-slash.
- Run the config.bat script.
- start your Libresource with the start.bat script.