Getting "Command is not a strategy" while trying to input /minebot stop after 300

[ascentfevers]

Hello! I'm trying to automate a mining process with a simple script on Minecraft 1.12.2. However I'm encountering the message "Command is not a strategy" when the script reaches the /minebot stop after 300 part. I'll share it:

repeat: /home chests /minebot pause 10 /minebot store

This will teleport me to my chests and store items.

/back /minebot pause 10

This will teleport me back to the mine.

stack: /minebot stop after 300 /minebot clear stack end

This is the part where I'm getting the problem.