"cannot synchronize history"

 
I am new, I have error message "cannot synchronize history" what does this mean and how can I fix it?
 
511249441 ABBOTT:
I am new, I have error message "cannot synchronize history" what does this mean and how can I fix it?
probably means the trading server is down for weekend maintenance.
 
Tallyho:
I am new, I have error message "cannot synchronize history" what does this mean and how can I fix it?
Try the following solutions:
1- Restart MT5
2- Check your internet connection. I encountered this problem before, and the solution was to restart MT5. These errors sometimes occur.

Note: If the problem persists, manually download the TICK data from within the MT5 platform.