`PATCH` on Container representation silently fails

[uvdsl]

Tried authenticated PATCH on https://storage-b94d19e0da65ece04c3a1ee3ad2ef66f.solid-01.muze.nl/public/, e.g.

@prefix solid: <http://www.w3.org/ns/solid/terms#>.
@prefix dcterms: <http://purl.org/dc/terms/>.

_:patch a solid:InsertDeletePatch ;
  solid:inserts {
    <https://storage-b94d19e0da65ece04c3a1ee3ad2ef66f.solid-01.muze.nl/public/> dcterms:title "testing" .
  } .

returns a 200 OK with an HTML page detailing

<br />
<b>Warning</b>:  file_put_contents(/opt/solid/pods/b94d/19e0/da65/ece0/4c3a/1ee3/ad2e/f66f/public): Failed to open stream: Is a directory in <b>/opt/solid/vendor/league/flysystem/src/Adapter/Local.php</b> on line <b>199</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /opt/solid/vendor/league/flysystem/src/Adapter/Local.php:199) in <b>/opt/solid/lib/StorageServer.php</b> on line <b>144</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /opt/solid/vendor/league/flysystem/src/Adapter/Local.php:199) in <b>/opt/solid/lib/StorageServer.php</b> on line <b>150</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /opt/solid/vendor/league/flysystem/src/Adapter/Local.php:199) in <b>/opt/solid/lib/StorageServer.php</b> on line <b>150</b><br />

Patches on non-container resources seem to work fine 🙂