How can I fix "We can't find the '{name}' attribute in the selector.html file"

hi @Sinziana Dobos you can solve this error by following steps first go to manage playground delete all the playground expect the one one you are using for this challenge in your case its (MY TRAILHEAD PLAYGROUND 1) then go to vs code then again author org then deploy in default org then come back to challenge page, click on  3 dots present side of the playground you will see the another playground expect the one your using select that and connect the org then verify the challenge .