I'm going to record a video, that way you can point out what I'm doing wrong.
hi
first /selectarea is also part of the protection script so even if you don't have block placer installed you can still select an area
oO but by how there is no feedback when you enter into the chat /delete my guess is you have not added the block placer plugin to your plugins folder, because even if it did not delete your beams you should have got error something went wrong or all construction removed, messages in chat
whats your server name i can come and take a look but your also need to add me as a admin for me to test it out