Step 1: First you’ll need to go to the DedicatedMC.io Panel and select the server of which you want to enable command blocks on.
Step 2: In the selected server, either go to ‘File Management’ or use your choice for SFTP. A guide on how to use SFTP can be found here.
Step 3: When using the File Manager on the Panel or SFTP, navigate inside the /home/container folder. (This is the main folder where your server jar file, and world folders are located.)
Step 4: In your File Manager, scroll tell you see the file named server.properties and then click on it to start editing the file.
Step 5: Find where it says enable-command-block inside the file.
Step 6: Change it from enable-command-block=false to enable-command-block=true
Step 7: Save the File by clicking on ‘Save File’
Step 8: Restart your Server