In admin/config/search/search_api/server/ownzones_local/edit there might be the case Solr path needs to be empty. For instance I'm using this module to configure the endpoint to a custom proxy API that then forwards the requests to SOLR. In this case adding a Solr Path will certainly mess up the url to the proxy. Anyhow, since the Solr path field is not required it should be tested for empty value.
In
admin/config/search/search_api/server/ownzones_local/editthere might be the case Solr path needs to be empty. For instance I'm using this module to configure the endpoint to a custom proxy API that then forwards the requests to SOLR. In this case adding a Solr Path will certainly mess up the url to the proxy. Anyhow, since the Solr path field is not required it should be tested for empty value.