Warning
Possibly breaking Nextcloud Streams (Radio stations and Podcasts based on files in Nextcloud shares).
Nextcloud changed the way how files can be downloaded (accessed) in shared folders in version 31.0.0 of Nextcloud server. This update enables Radio-API to access shares of Nextcloud version 31.0.0. However, it may break the access to older versions of Nextcloud server. Thus, there is an configuration option, CONF_LEGACY_NEXTCLOUD which can be set to true for accessing older versions of Nextcloud via Radio-API or to false (the default) for accessing newer versions.
So, before updating Radio-API, check your Nextcloud version and set CONF_LEGACY_NEXTCLOUD=true if necessary. (And also remember to update Radio-API when updating Nextcloud to versions >= 31.)