If you are unable to request permission, it means you have to "review and approve dataset upload terms of service". The instructions are documented at  https://openfnirs.org/software/bids-fnirs-cloud/bfnirs-documentation/#RequestPermission .

Please note that in order to have dataset ownership privileges, you must have Principal Investigator status or equivalent at your institution. Further, you attest that you have permission to upload the data set to this cloud server from your institution.