New source found from dndbeyond.com

ddb_main/tools/js/Shared/containers/panes/SettingsPane/SettingsPane.tsx

@@ -1,5 +1,6 @@
 import React from "react";
 import { connect, DispatchProp } from "react-redux";
+import { AnyAction } from "redux";
 
 import {
   characterActions,
@@ -99,7 +100,9 @@ function generateSettingsContexts(
   return SETTINGS_CONTEXTS;
 }
 
-interface Props extends DispatchProp {
+// TODO: We are typing with AnyAction here to work around issues with UnknownAction, the type that was introduced in Redux 5.
+// If we decide to modernize to Redux 5, we will need to refactor much of the Rules Engine redux usage.
+interface Props extends DispatchProp<AnyAction> {
   // Figure out if this is right
   preferences: CharacterPreferences;
   identifiers: PaneIdentifiersSettingsContext;