$ curl -i 'http://localhost:8080/geoserver/ows?SERVICE=WMS&LAYERS=geor:public_layer&FORMAT=image/png&VERSION=1.3.0&SLD_VERSION=1.1.0&REQUEST=GetMap&CRS=EPSG:3857&BBOX=-20820223,-20820223,20820223,20820223&WIDTH=10&HEIGHT=10'
HTTP/1.1 200 OK
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
Content-Type: text/xml;charset=utf-8
Transfer-Encoding: chunked
<?xml version="1.0" encoding="UTF-8"?><ServiceExceptionReport version="1.3.0" xmlns="http://www.opengis.net/ogc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/ogc https://geodata.bac-a-sable.inrae.fr/geoserver/schemas/wms/1.3.0/exceptions_1_3_0.xsd"> <ServiceException code="LayerNotDefined" locator="layers">
Could not find layer geor:public_layer
</ServiceException></ServiceExceptionReport>