using rdf4j-server sparql endpoint

[naturzukunft]

Hi there,
i try to use an rd4j-server endpoint in https://demo.metreeca.com/self/ but it's not working.
Did i use the wrong link? -> https://rdf.dev.osalliance.com/rdf4j-server/repositories/kvm_loa

workbench: https://rdf.dev.osalliance.com/rdf4j-workbench/repositories/kvm_loa/query

Thanks Fredy

[knoan]

The URL of your endpoint is correct, but metreeca/self (well, actually the browser running it…) requires CORS requests to be supported and that's apparently not your case.

The process of enabling CORS support is server-specific: you may want either to refer to https://enable-cors.org/server.html or to ask for workbench-specific alternatives on the rdf4j mailing list.