HTTP ERROR 500 org.springframework.security.web.firewall.RequestRejectedException: The request was rejected because the URL contained a potentially malicious String "%25"

URI:/ansatte/Forhandlinger%2520i%2520n%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BDringslivet%2520er%2520ingen%2520sp%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BDk,%2520det%2520gjelder%2520%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%2520vite%2520hva%2520man%2520gj%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BDr.%2520Tre%2520studenter%2520fra%2520Handelsh%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BD%25EF%25BF%25BDgskolen%2520ved%2520UiT%2520har%2520kommet%2520til%2520finalen%2520i%2520en%2520internasjonal%2520forhandlingskonkurranse.
STATUS:500
MESSAGE:org.springframework.security.web.firewall.RequestRejectedException: The request was rejected because the URL contained a potentially malicious String "%25"
SERVLET:dispatcherServlet
CAUSED BY:org.springframework.security.web.firewall.RequestRejectedException: The request was rejected because the URL contained a potentially malicious String "%25"