I rented vps two weeks ago but today this logo appeared (inside the red circle).
What does that logo mean? And how can it be fixed?
This usually means that you are not properly synchronized/migrated with your MQL5 VPS.
Check your MQL5 VPS (right click) Journal for details and if you see that something is not right, synchronize/migrate your local trading environment (Experts, indicators, signal etc.) again.
It may also be nothing and can be resolved with a simple terminal restart.