add uuid nil check

handlers/workspace.go

@@ -188,12 +188,19 @@ func (aH *AccessHandler) ReadWorkspaceData(c *gin.Context) {
 		return
 	}
 
+	if workspace.Uuid == uuid.Nil {
+		aH.logger.Error("ReadWorkspaceData", "uuid nil")
+		c.JSON(http.StatusBadRequest, nil)
+		return
+	}
+
 	files, err := os.ReadDir(workspace.Uuid.String())
 	if err != nil {
 		aH.logger.Error("ReadWorkspaceData", err)
 		c.JSON(http.StatusBadRequest, nil)
 		return
 	}
+
 	var response []string
 	for _, f := range files {
 		if f.IsDir() || !strings.Contains(filepath.Ext(f.Name()), ".db") {