Could you maybe explain a little bit more what is happening? What happens when you search in OJS? Do you then see anything? Is there then an error in the error log file?
I do not see the whole URL above, so did you adapt the parameters for your search, i.e. q=amit (author name), inst_id:%22test-inst%22 (solr id), journal_id:%22test-inst-2%22 (journal id)? What do you see then?
When I perform a search with the simple search plugin, solr works, the search is performed.
When I enter to advancer search, and place something to look for (in any field) the search returns nothing.
. Solr works .Plugin search works, advancer search does not work. : S