I am building a server in 1.14.4, and cannot place blocks brought in by recent updates. I cannot place lanterns, grindstones, campfires, etc., the block flickers into view for a moment before disappearing. I can place these blocks in singleplayer, but for some reason they break on my server. I can, however, place these blocks using WorldEdit. Does anyone know what might be causing this issue? Thanks.
Is there any other plugins? If not then rebuild your Spigot or Bukkit jar file using BuildTools to a newer build, and restart the server fresh. Remove all the configs and other files, and run the new jar file in a brand new folder.