Command Sign delay not working.

[ghost]

I wanted to set a command sign that helps me to fill up a block after a 3 secs of delay.

The sign is the following:

     [CMD]
 Camera_stop_1
   3,CONSOLE
      1,D

"Camera_stop_1" is a command script with the following command:

- minecraft:fill -53 5 125 -53 5 125 minecraft:redstone_block

No matter what the value is for the delay starting from 1, it will always come out an error saying: "that position is not loaded"

whereas if I didn't set any delay, the sign works perfectly.

Can someone help me with this issue?