Document Upload via POST /v1/company/documents HTTP/1.1

Hello,

we are trying to upload documents automatically to Personio using Microsoft Flow. When we are trying to send the HTTP request however, we receive a 502 "Bad Gateway" Error.
Same when I execute the request through Visual Studio Code, but here it says "301 Moved Permanently". This has been the case the last two weeks. Is there something wrong with the API at the moment?

Kind regards,

Michael