[7.x][ML] DFA _explain API should not fail when none field is include…#66288

dimitris-athanasiou merged 1 commit intoelastic:7.xelastic/elasticsearch:7.xfrom

dimitris-athanasiou:improve-error-msg-when-explain-dfa-encounters-no-features-7xdimitris-athanasiou/elasticsearch:improve-error-msg-when-explain-dfa-encounters-no-features-7xCopy head branch name to clipboard