Resolve "minerva popup `Cannot read property 'getModel' of null`"

Closes #432 (closed)

frontend-js/src/main/js/map/overlay/AbstractDbOverlay.js

@@ -180,6 +180,12 @@ AbstractDbOverlay.prototype.searchByEncodedQuery = function (originalQuery, fitB
     return this.searchNamesByTarget(query.target);
   } else if (query.type === AbstractDbOverlay.QueryType.SEARCH_BY_COORDINATES) {
     query.coordinates = new google.maps.Point(query.coordinates.x, query.coordinates.y);
+    if (this.getMap().getSubmapById(query.modelId) === null) {
+      //this can happen when cached data comes from project that was removed and something else
+      //was uploaded with the same name
+      logger.warn("Invalid search query. Model doesn't exist: " + query.modelId);
+      return Promise.resolve();
+    }
     return this.searchByCoordinates(query);
   } else {
     throw new Error("Unknown type of query: " + query.type);