Plugin combi error mysterybox spawn

[genboy]

Hi @TheAz928 (and other coders) Mysterybox is a nice and fun plugin!

I'm developing the Festival plugin, which can protect area's and levels with flags. There is a mob- and an animals-flag to stop those specific type entities from spawning.

Now this combined with mysterybox inflicts an error genboy/Festival#118 when opening a mystery-chest.
I'm looking how to solve this, maybe there already is a clean workaround or solution?

I tried to filter out the action onEntitySpawn
if( $this->helper->isPluginLoaded( "MysteryBox" ) && $e instanceof mysterybox/entity/MysterySkull)
but still an error occurs

#0 plugins/Festival/src/genboy/Festival/Festival(2264): pocketmine\entity\Entity->getSaveId()
#1 plugins/Festival/src/genboy/Festival/Festival(1766): genboy\Festival\Festival->canEntitySpawn(object mysterybox\entity\MysterySkull)
#2 src/pocketmine/plugin/MethodEventExecutor(38): genboy\Festival\Festival->onEntitySpawn(object pocketmine\event\entity\EntitySpawnEvent)

Hope someone can help thank you!

[TheAz928]

I'll check this later on

[genboy]

@TheAz928 let me know if u know a solution, thank u