This error occurs when a session using the EDS key has frozen somewhere in the database, or the same key is already being used on the website (for example, on the ESF IS portal in another window or session).
What to do
Close all active sessions where the key could have been used — both in the 1C configuration itself and in the browser on the esf.kgd.gov.kz website, if it is open in parallel. After that, wait 5–10 minutes: during this time, the "frozen" session on the server is usually released, and the key becomes available for use again.
After this time has passed, try sending the ESF again — as a rule, the error disappears.
Frequently Asked Questions
What if the error repeats even after waiting? Check again that there are no open sessions with the same key — neither in 1C, nor in the browser, nor on other computers where the same EDS key could have been used.
Is it possible to speed up the process instead of waiting 5-10 minutes? The key point is closing all active sessions; the waiting is needed so that the server correctly releases the occupied key.