Fix

code/game/machinery/hologram.dm

@@ -264,7 +264,7 @@ Possible to do for anyone motivated enough:
 	for(var/I in holo_calls)
 		var/datum/holocall/HC = I
 		var/list/call_data = list(
-			caller = HC.user,
+			caller1 = HC.user,
 			connected = HC.connected_holopad == src ? TRUE : FALSE,
 			ref = REF(HC)
 		)

code/game/objects/structures/plasticflaps.dm

@@ -65,7 +65,7 @@
 		if(!(SEND_SIGNAL(living_caller, COMSIG_CHECK_VENTCRAWL)) && living_caller.mob_size != MOB_SIZE_TINY)
 			return FALSE
 
-	if(caller?.pulling)
+	if(caller1?.pulling)
 		return CanAStarPass(ID, to_dir, caller1.pulling)
 	return TRUE //diseases, stings, etc can pass