The map is not saved in the Yandex map constructor. What to do?

Question

Yandex

Faced a glitch, because of which I risk losing the work done during the day.
The map in the constructor, which was successfully saved yesterday, today (after returning from hibernation) does not want to be saved:

• on an attempt to "save and continue" the system issues "sign in to your account" (although judging by the upper right corner, I remained logged in),
  
• what am I after clicking the link "login" and making sure
  
• after returning to the list of maps in a new window, only the status of yesterday is visible in the required map,
  
• logging out and logging back in does not help - everything is the same.
  

It is clear that there is feedback from Yandex, etc., but they do not respond quickly (we'll see what happens this time), and a solution is needed now.
Any ideas what else can be done now?