【Report】HttpException: HTTP 415 Unsupported Media Type

[wangsuicheng]

DavColletion.reportChanges has error for NextCloud webdav

----- begin exception -----

E  at.bitfire.dav4jvm.exception.HttpException: HTTP 415 Unsupported Media Type
        at at.bitfire.dav4jvm.DavResource.checkStatus(DavResource.kt:591)
        at at.bitfire.dav4jvm.DavResource.checkStatus(DavResource.kt:565)
        at at.bitfire.dav4jvm.DavResource.processMultiStatus(DavResource.kt:682)
        at at.bitfire.dav4jvm.DavCollection.reportChanges(DavCollection.kt:119)

[rfc2822]

Sounds like a Nextcloud problem. Please provide more details.

[wangsuicheng]

<?xml version="1.0" encoding="utf-8"?>
2025-12-11 17:31:42.216 20074-20111 okhttp.OkHttpClient         I  <d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
2025-12-11 17:31:42.216 20074-20111 okhttp.OkHttpClient         I    <s:exception>Sabre\DAV\Exception\ReportNotSupported</s:exception>
2025-12-11 17:31:42.216 20074-20111 okhttp.OkHttpClient         I    <s:message>The {DAV:}sync-collection REPORT is not supported on this url.</s:message>
2025-12-11 17:31:42.216 20074-20111 okhttp.OkHttpClient         I    <d:supported-report/>
2025-12-11 17:31:42.216 20074-20111 okhttp.OkHttpClient         I  </d:error>

I open okhttp log，found more details, maybe the ReportNotSupported is not equal to ‘HTTP 415 Unsupported Media Type’？