diff --git a/analyticsApi/main.go b/analyticsApi/main.go
index 43a9b8e..67aa11f 100644
--- a/analyticsApi/main.go
+++ b/analyticsApi/main.go
@@ -223,33 +223,34 @@ func initPageViewCount(app *pocketbase.PocketBase, e *core.ServeEvent) {
 //
 //	{
 //	  "device_type": [
-//	    { "value": "<device type>", "count": <session count> },
+//	    { "value": "<device type>", "count": <session count>, "error_count": <error count> },
 //	    ...
 //	  ],
 //	  "browser_name": [
-//	    { "value": "<browser name>", "count": <session count> },
+//	    { "value": "<browser name>", "count": <session count>, "error_count": <error count> },
 //	    ...
 //	  ],
 //	  "operating_system": [
-//	    { "value": "<operating system>", "count": <session count> },
+//	    { "value": "<operating system>", "count": <session count>, "error_count": <error count> },
 //	    ...
 //	  ],
 //	  "user_agent": [
-//	    { "value": "<user agent>", "count": <session count> },
+//	    { "value": "<user agent>", "count": <session count>, "error_count": <error count> },
 //	    ...
 //	  ],
 //	  "geo_country_code": [
-//	    { "value": "<country code>", "count": <session count> },
+//	    { "value": "<country code>", "count": <session count>, "error_count": <error count> },
 //	    ...
 //	  ],
 //	  "preferred_language": [
-//	    { "value": "<preferred language>", "count": <session count> },
+//	    { "value": "<preferred language>", "count": <session count>, "error_count": <error count> },
 //	    ...
 //	  ]
 //	}
 //
-// Each category includes an array of objects where `value` is the specific item (e.g., a device type or browser name)
-// and `count` is the number of sessions matching that item since `startDate`.
+// Each category includes an array of objects where `value` is the specific item (e.g., a device type or browser name),
+// `count` is the total number of sessions matching that item since `startDate`, and `error_count` is the number
+// of sessions with errors for that item (where the `error` field is not NULL) since `startDate`.
 func initAggregateCount(app *pocketbase.PocketBase, e *core.ServeEvent) {
 	e.Router.GET("/api/analytics/aggregateCount", func(c echo.Context) error {
 
@@ -265,8 +266,9 @@ func initAggregateCount(app *pocketbase.PocketBase, e *core.ServeEvent) {
 		}
 
 		type Data struct {
-			Value string `db:"value" json:"value"`
-			Count int    `db:"count" json:"count"`
+			Value      string `db:"value" json:"value"`
+			Count      int    `db:"count" json:"count"`
+			ErrorCount int    `db:"error_count" json:"error_count"`
 		}
 
 		// Use a map to store the response data
@@ -279,7 +281,10 @@ func initAggregateCount(app *pocketbase.PocketBase, e *core.ServeEvent) {
 
 			err := app.Dao().DB().
 				NewQuery(`
-					SELECT IFNULL(` + field + `, 'N/A') as value, COUNT(id) AS count
+					SELECT 
+						IFNULL(` + field + `, 'N/A') as value, 
+						COUNT(id) AS count,
+						SUM(CASE WHEN error IS NOT NULL THEN 1 ELSE 0 END) AS error_count
 					FROM analyticsSessions
 					WHERE created >= {:startDate}
 					GROUP BY ` + field).
@@ -299,7 +304,6 @@ func initAggregateCount(app *pocketbase.PocketBase, e *core.ServeEvent) {
 		// Return the final JSON response
 		return c.JSON(200, response)
 	}, apis.ActivityLogger(app))
-
 }
 
 // InitAnalyticsApi initializes analytics api endpoints