when synchronizing the elevation queries, an error is thrown by solr:
Error when updating /home/deimosaffair/htdocs/4.7gitted/extension/ezfind/java/solr/./conf/elevate.xml : Error initializing QueryElevationComponent.

to reproduce:

• type any word to elevate
• choose any object from content and elevate it:
  the message "Successful creation of the following Elevate configuration (Details)" appears at the top
• type two words to elevate
• choose any object from content and elevate it:
  the message "Successful creation of the following Elevate configuration (Details)" appears at the top
• click on synchronize: the error will show up

note: this error is generated by SOLR, as can be seen in output when running SOLR from cli