Hi!
My Dspace 7.6.1 is having an odd behaviour on search results.
When I first do a search of any subject, DSpace shows the results without any problems, however, if I refresh the page of that search result, the following error is thrown:

The dspace.log and catalina.out don't show any errors when I refresh.
The solr only shows this after a refresh:
It would be great if someone could help!
Juan.