❓ Why are my arenas not regenerating?

#Answer

Work through these in order. One of them is nearly always the cause.

1. Regeneration is switched off for the map. Open the map in the editor and check that Regeneration is enabled. It is off by default on a new map.
2. No schematic was generated. Schematic regeneration needs a saved copy of the arena to paste back. Generate it from the map's regeneration menu.
3. WorldEdit or FAWE is missing. If the map's Regeneration Engine is set to WorldEdit, one of them must be installed. Switch the engine to Internal if you would rather not install either.
4. The universal region does not cover the whole build. Anything outside it is not part of the arena and is never restored. This is the usual cause of "most of it comes back, but not all of it".
5. Blocks were changed outside the region. Players who build their way out of the arena leave blocks the plugin has no record of.

#If it works but not often enough

By default the arena is restored when the match ends. To restore it between rounds as well, turn on Post Round Regeneration. If you suspect a previous regeneration silently failed, Pre Match Regeneration restores the arena again at the start of every match as a safety net.

See Arena Regeneration.