Hi, and welcome!
Please see the FAQ: What's a reproducible example (`reprex`) and how do I create one? Using a reprex, complete with representative data will attract quicker and more answers.
What reprex does is to avoid the hurdle of having to reverse engineer a problem before offering solutions.
About the most I can offer without one is that the key seems
'x' must be an array of at least two dimensions
saying that somewhere along the line a function expected more than it got, a vector.