The current logbook does not support groovy configuration files. This is fairly well documented. It also appears that this is temporary.
I am unable to find any indication of when groovy support is expected to be restored. If it is expected to be in a week or two, I will wait for that and not rewrite by config file in XML. If it is months or years, I will need to rewrite them.
It is certainly possible that restoring support requires an update to groovy. In that case, clear documentation of what changes are needed in groovy, ideally with links to the corresponding issues in the groovy project, would be helpful.