Today in the evening I have been solving problems from problemset. When I have opened new problem, I got an error![](/predownloaded/e0/3f/e03fe3fb6dcf64dc419f99c78c58d27d1c29554c.png)
RPC call for action failed:
![](/predownloaded/e0/3f/e03fe3fb6dcf64dc419f99c78c58d27d1c29554c.png)
I caught this error in unsolved problems only, but solved problems can be opened without any errors.
Who knows, what has happened?
P.S. Sorry for my bad english :)