cannot click on the transfer data mesh property

What should I do, I want to rigging my clothes into my character, but if the property panel cannot be clicked, it will be a problem. Help me

Don’t know why you can’t click it.

I’ve always used a data transfer modifier, which is the same as your transfer mesh data operator (in fact, I never even knew about transfer mesh data). As a workaround, you could use that instead.

I had the same problem.
I loaded factory settings and it solved.