filterAction: Server error: `GET https://www.hetsl.ch/rest/solr-search/?pid=4091&tx_solr%5Bq%5D=&tx_solr%5Bfilter%5D%5B0%5D=audiences%3AChercheuses%20et%20chercheurs&tx_solr%5Bfilter%5D%5B1%5D=audiences%3ADoctorant%C2%B7e%C2%B7s&tx_solr%5Bfilter%5D%5B2%5D=audiences%3APraticiennes%20et%20praticiens%20formateurs&tx_solr%5Bfilter%5D%5B3%5D=audiences%3AToute%20personne%20int%C3%A9ress%C3%A9e&tx_solr%5Bfilter%5D%5B4%5D=audiences%3AVacataires&tx_solr%5Bfilter%5D%5B5%5D=networks%3A934&tx_solr%5Bfilter%5D%5B6%5D=themes%3ASant%C3%A9&tx_solr%5Bfilter%5D%5B7%5D=type%3A0&tx_solr%5Bfilter%5D%5B8%5D=types%3AMatin%C3%A9e%20d%27%C3%A9tude&tx_solr%5Bfilter%5D%5B9%5D=type%3A0&tx_solr%5Bfilter%5D%5B10%5D=storage%3A2191&tx_solr%5Bfilter%5D%5B11%5D=storage%3A2186&tx_solr%5Bfilter%5D%5B12%5D=storage%3A2189&tx_solr%5Bfilter%5D%5B13%5D=storage%3A2188&tx_solr%5Bfilter%5D%5B14%5D=storage%3A2190&tx_solr%5Bfilter%5D%5B15%5D=storage%3A4051&tx_solr%5Bfilter%5D%5B16%5D=storage%3A2458&tx_solr%5Bfilter%5D%5B17%5D=storage%3A2459&tx_solr%5Bfilter%5D%5B18%5D=storage%3A2953&tx_solr%5Bfilter%5D%5B19%5D=storage%3A2460&tx_solr%5Bfilter%5D%5B20%5D=storage%3A2474&tx_solr%5Bfilter%5D%5B21%5D=storage%3A4040&tx_solr%5Bfilter%5D%5B22%5D=storage%3A2617&tx_solr%5Bfilter%5D%5B23%5D=storage%3A4247&tx_solr%5Bfilter%5D%5B24%5D=networks%3A934&tx_solr%5Bfilter%5D%5B25%5D=startDate%3A201612050000-202612050000` resulted in a `501 Not Implemented` response:
{"error":"Sorry! Something is wrong. Exception code #0"}