Unable to create diff files – Error: EISDIR 
After upgrading from 0.11.x to o.12.x
I am getting the following error, every time I save or I try to create diff files.

> Failed…
> Error: EISDIR: illegal operation on a directory, read
> '/users/[…]/[sketch_files_path]/.exportedArtboards/[file_name]/input'

![Screenshot 2020-05-07 at 11 08 28](https://user-images.githubusercontent.com/4033737/81277188-5bcc7500-9054-11ea-9c68-09668639c8f0.png)

It seems the problem is with the name of my symbols in the document:
> input/primary-btn
> input/alt-btn

After some searching, I found this:
> "EISDIR means that the target of the operation is a directory in reality but that the expected filetype of the target is something other than a directory."

Is there a way to solve this problem or is it a bug with the plugin?
When I revert to 0.11 I have no problems.

Sketch version 65.1
macOS 10.15.4