Error when importing any data source (either csv or from a data source)

Hi, I'm Gonzalo, and I have a trial version for 30 days in SAP Analytics Cloud.

When I try to import data, it stays in a "loading" state for a long time.

Then it returns an error ".xlsx has failed to upload because the data acquisition service encountered an internal error.

Correlation ID: 88354746-2123-4784-9512-147897013310 error.png

How can I do to solve it?