Hi @jenshumrich ,
Yep, I can confirm. I've uploaded CSV file that has size greater than 10 mb and received the same error.
I think we are hitting the same limitation as is described in case of REST API /workspace/export endpoint, which states:
If the limit (10MB) is exceeded, exception with error code is thrown
As a workaround, you can use dbutils to copy this file to your cloud storage and download it from there.