Both GriefPrevention and PermissionManager are throwing errors on startup. I should point out here that GriefPrevention strongly recommends using Luckperms, as other permissions plugins have trouble handling its’ contexts.
The mod pjw was designed for spongeapi 6.1.0-SNAPSHOT but version 5.2.0-SNAPSHOT-ab52c0c is in use. It may not work properly. (see log line 3988 and onward).
Make sure you have correct versions for the SpongeAPI version you’re using (API 5.2).