Hey I like this Addon and I want to implement it on my TTT(2) Server but I got this error:

[lexical-tools-master] addons/lexical-tools-master/lua/entities/sent_spawnplatform/sv_spawning.lua:166: attempt to call global 'DoPropSpawnedEffect' (a nil value)
1. InternalSpawnNPC - addons/lexical-tools-master/lua/entities/sent_spawnplatform/sv_spawning.lua:166
2. SpawnOne - addons/lexical-tools-master/lua/entities/sent_spawnplatform/sv_spawning.lua:368
3. PostEntityPaste - addons/lexical-tools-master/lua/entities/sent_spawnplatform/sv_duplication.lua:100
4. Paste - lua/includes/modules/duplicator.lua:766
5. unknown - lua/autorun/server/permaall_init.lua:99



Spawning map storages...
ERROR: Trying to derive entity entity_looting from non existant entity base_gmodentity! (x14)
ERROR: Trying to derive entity entity_looting from non existant entity base_gmodentity! (x7)

[lexical-tools-master] addons/lexical-tools-master/lua/entities/sent_spawnplatform/sv_spawning.lua:166: attempt to call global 'DoPropSpawnedEffect' (a nil value)
1. InternalSpawnNPC - addons/lexical-tools-master/lua/entities/sent_spawnplatform/sv_spawning.lua:166
2. SpawnOne - addons/lexical-tools-master/lua/entities/sent_spawnplatform/sv_spawning.lua:368
3. unknown - addons/lexical-tools-master/lua/entities/sent_spawnplatform/init.lua:132 (x21)



PS: I tried to save the platforms with PermaAll and PermaProps.