Starting tomorrow, there will be updates especially for version 1.13 coming!
With one of the last Spigot updates the problem with the Worldgenerator in 1.13 was fixed.
Unfortunately some chests are no longer created correctly... But I will find a solution for this.
Changed:
+ Displaying the update message was not set to false after updating from a particular version.
+ The blindness effect when using the MHP-Portal has been extended.
Bugfixes:
+ A problem with the portal detection in version 1.13 was fixed.