This issue arises from the fact that the information regarding your employment during that period has not been entered into the Unified National Labor System (my.mehnat.uz). Find out more.
In such cases, you need to obtain copies of the orders for employment and termination from the organization, and confirm the fact of your work activity at this place during the specified period.
Therefore, whenever you are getting a job at an organization or leaving one, always ask the HR staff to provide information on the full digitalization of your data in the my.mehnat.uz database.