Can't renew access_token with refresh_token
I'm trying to renew an access_token using the refresh_token.
Sending a POST request on /oauth/token?grant_type=
refresh_token&client_id=
my_client_id&client_secret=
my_client_secret&refresh_token=
my_refresh_token gives me an Internal server error.
Does Pleroma need another/different parameter?