You should have skript effects enabled on your server. They are useful for debugging and checking simple stuff

How to enable skript effects

go to Plugins/Skript/config.sk

enable effect commands: false

enable effect commands: true


allow ops to use effect commands: false

allow ops to use effect commands: true


after you saved the file, type /skript reload config
by default, you can execute skript effects using !<effect>
example

!send "hello"
hello

!send "%1+1%"
2

!send "%targeted block of player%"
white wool block

[[ Important notices ]]

• run effects are not 100% the same as effects run inside an sk file
  
• you cannot use local variables
  
• multiple spaces (more than 2) will get reduced to 2 spaces then executed
  
• you cannot put color code symbols § in chat (unless you modify the server jar)
  
• you cannot use options
  

important*
if your script has a function that has a long parse time, do not execute this as an effect. because of how parsing works, your server will freeze for a few seconds