diff --git a/pkg/routes/caldav/listStorageProvider.go b/pkg/routes/caldav/listStorageProvider.go
index 0d1692c18..096304dcf 100644
--- a/pkg/routes/caldav/listStorageProvider.go
+++ b/pkg/routes/caldav/listStorageProvider.go
@@ -130,12 +130,20 @@ func (vcls *VikunjaCaldavListStorage) GetResourcesByList(rpaths []string) ([]dat
 	// So we split the url in parts, take the last one and strip the ".ics" at the end
 	var uids []string
 	for _, path := range rpaths {
+		if !strings.HasSuffix(path, ".ics") {
+			// Looks like this is not a task url
+			continue
+		}
 		parts := strings.Split(path, "/")
 		uid := []rune(parts[4])          // The 4th part is the id with ".ics" suffix
 		endlen := len(uid) - len(".ics") // ".ics" are 4 bytes
 		uids = append(uids, string(uid[:endlen]))
 	}
 
+	if len(uids) == 0 {
+		return []data.Resource{}, nil
+	}
+
 	s := db.NewSession()
 	defer s.Close()