If your server is crashing with the error
java.lang.IllegalArgumentException: ChunkNibbleArrays should be 2048 bytes not: 0, it means that your world is corrupt.
This error usually occurs when switching between server version (such as between 1.12.2 and 1.13.2) or server type (such as between Forge and Spigot/Vanilla). It is especially likely when downgrading to a lower version, or switching between vastly different versions.
To attempt to solve a world corruption, you can follow our tutorial: https://shockbyte.com/billing/knowledgebase/46/How-to-Fix-Corrupted-Minecraft-Worlds.htmlIf you require any further assistance, please contact our support at: https://shockbyte.com/billing/submitticket.php