datasetGetProposal gives an error. Probably this wasn't updated for v4:
$ scicat-cli datasetGetProposal p14209
2026/01/16 18:18:35 Latest version: 3.0.0
2026/01/16 18:18:35 Your version of this program is up-to-date
2026/01/16 18:18:35 You are about to retrieve the proposal information from the === production === data catalog environment...
2026/01/16 18:18:48 error when logging in: '"Internal server error"'