Hi @inpoo3024
Since Korean characters were used in the name or identifier fields—which UiPath might not completely support in some activities or contexts—it appears that the problem is connected to incorrect characters in the identifier.
Try replacing any identifiers or file names in English.
If there are any character restrictions, then hover over them to check for the error message.
And after replacing korean with english, the button does not get activated, probably try refreshing the page and check.
Hope this helps you someway or the other.
Thank You
Happy Learning!