options:

#Minimum amount of blocks farm from X cord to tp to

    min.x: 9

#maximum amount of blocks farm from X cord to tp to

    max.x: 609

#Minimum amount of blocks farm from Z cord to tp to

    min.z: 347

#maximum amount of blocks farm from Z cord to tp to

    max.z: 947

#Amount of time before the player will be allowed to use the command again

    cooldown: 1 minutes

#Avoid spawning in lava, water and air

    avoid: air or water block or lava block

#To add worlds it would look like 

#    worlds: "world" or "world_nether" or "world_the_end"

    worlds: "world"

#Permission

    permission: randomtp.use

#No permission message

    PermMsg: &4You do not have permission to use this command!

#Can not execute command in this world message

    NoWorldMsg: &4You can’t use this command in this world!

#Cooldown message

    SpamMsg: &4Please do not spam this command!

Command /randomtp:

    description: Teleports player to random location not in water

    permission: {@permission}

    permission message: {@PermMsg}

    aliases: /rtp, /wild, /random

    trigger:

        if world is not {@worlds}:

            message "{@NoWorldMsg}"

        else:

            if difference between {cooldowns::randomtp::%player%} and now < {@cooldown}:

                send "{@SpamMsg}"

            else:

                set {_loc::old} to player's location

                while player's location is {_loc::old}:

                    set {_loc::new} to location at random number between {@min.x} and {@max.x}, 0, random number between {@min.z} and {@max.z}

                    loop blocks above {_loc::new}:

                        if loop-block and block above loop-block are air:

                            if block under loop-block is not {@avoid}:

                                set {_loc::new} to location of loop-block

                                teleport player to {_loc::new}

                                if light level at player <= 2:

                                    set block at player to ground torch

                                set {cooldowns::randomtp::%player%} to now 

                                stop loop

                    wait 10 ticks

 Can't understand this condition: 'block under loop-block is not air or water block or lava block'

[05:48:25 INFO]:     Line: if block under loop-block is not {@avoid}:

해당오류를 어떻게 해야 해결될까요?