Of runtimes and null.

code/modules/mob/living/silicon/pai/pai.dm

@@ -302,11 +302,11 @@
 /obj/item/paicard/attackby(obj/item/W, mob/user, params)
 	..()
 	user.set_machine(src)
-	if(pai.encryptmod == TRUE)
-		if(W.tool_behaviour == TOOL_SCREWDRIVER)
-			pai.radio.attackby(W, user, params)
-		else if(istype(W, /obj/item/encryptionkey))
-			pai.radio.attackby(W, user, params)
+	var/encryption_key_stuff = W.tool_behaviour == TOOL_SCREWDRIVER || istype(W, /obj/item/encryptionkey)
+	if(!encryption_key_stuff)
+		return
+	if(pai?.encryptmod)
+		pai.radio.attackby(W, user, params)
 	else
 		to_chat(user, "Encryption Key ports not configured.")