See if an enchantment is on the item in the player's hand

Hello, I made a procedure so that each time someone breaks a block they check if the enchantment is on the item. I did it with this code:
https://imgur.com/a/lghuOzn

Now the concern is that I have this little error that I don't know how to fix:
https://imgur.com/oVvDEh4

I hope you will be able to help me and thank you in advance for the reply.
(Ps: I am using version 2020.5 in 1.15.2)

French: https://pastebin.com/MG3zH8Ex