Web Coverage Service (WCS) does not work anymore

[JakobMiksch]

Downloading Raster images via WCS does not work anymore.

With a GET-Request like this it used to work:

https://sauber-sdi.meggsimum.de/geoserver/image_mosaics/wms?SERVICE=WCS&
VERSION=2.0.1&
REQUEST=GetCoverage&
COVERAGEID=image_mosaics:nrw_no2_am1h&
SUBSET=time("2021-09-08T21:00:00.000Z")&
FORMAT=GeoTIFF

It used to provide a raster file. But now the error message is:

<ows:ExceptionReport version="2.0.0" xsi:schemaLocation="http://www.opengis.net/ows/2.0 http://schemas.opengis.net/ows/2.0/owsExceptionReport.xsd">
<ows:Exception exceptionCode="NoApplicableCode">
<ows:ExceptionText>
java.lang.OutOfMemoryError: Java heap space Java heap space
</ows:ExceptionText>
</ows:Exception>
</ows:ExceptionReport>