As a test, I’ve reverted the Role Scoper to Default values (on plugin’s main page exists a button called “Revert to Defaults”) and the incompatibility persists…
I’m using Relevanssi 3.0 and Role Scoper 1.3.55 and no search results are showing too. By simple disabling Role Scoper I can get correct Relevanssi result; by enable RS, the search page shows a 404 error.
Sorry: the correct title is “submit button don’t WORK”