kibana version 7.9.1. recently migrated from 6.8.x.
steps taken to recreate: kibana home -> dashboards -> open up existing dashboard -> click "Add" -> "Add panels" pane never populates with any saved visualizations. "Types:" field shows 2 types are selected by default but both of the 2 types are grayed out and can't be modified.
notes: am able to list visualizations in saved objects under stack management after changing the saved objects type. additionally, default search in saved objects barfs up an "unable to load saved objects" toast. am able to list out each type of saved objects successfully e.g. "type:(search)" but "type:(search or )" will barf up the same toast and only show the saved objects that match the first term of the type search.
attempted to use the fix found in Kibana cannot list saved_objects. Fielddata is disabled on text fields by default but since this is on 7.9, the bug found in 7.4 should have been resolved.
browser console shows this:
Uncaught (in promise) SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data ... read this post (Kibana: unexpected character at line 1 column 1 of the JSON data - #4 by ade.syseng) but again, already on 7.9 so the fix there is not applicable.
logging is not active b/c <vendor's configuration> ... not yet anyway