I installed the 'stock' auditbeat dashboards for v7.10. Opening the 'System Overview ECS' I get this error on the majority of the panels:
search_phase_execution_exception
Error: Bad Request
at Fetch._callee3$ (http://10.95.96.38/36063/bundles/core/core.entry.js:6:59535)
at l (http://10.95.96.38/36063/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:380:1740520)
at Generator._invoke (http://10.95.96.38/36063/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:380:1740273)
at Generator.forEach.e.<computed> [as next] (http://10.95.96.38/36063/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:380:1740877)
at fetch_asyncGeneratorStep (http://10.95.96.38/36063/bundles/core/core.entry.js:6:52652)
at _next (http://10.95.96.38/36063/bundles/core/core.entry.js:6:52968)