MQL5 CLOUD optimization not working

 
it seems since last friday, the cloud is not working for me, USA, EUROPE 1 and 2 none of them is working. what is the problem?
 

2021.03.29 16:48:15.858 Tester EURUSD: ticks data begins from 2012.01.02 00:00

2021.03.29 16:48:15.858 Tester genetic optimization started

2021.03.29 16:48:15.859 MQL5 Cloud USA connecting to agent2.mql5.net:443

2021.03.29 16:48:15.859 MQL5 Cloud USA connected

2021.03.29 16:48:16.200 MQL5 Cloud USA authorized (server build 2860)

2021.03.29 16:48:16.200 Tester MQL5 Cloud USA selected for genetic computations with ping 153 ms

2021.03.29 16:48:17.580 MQL5 Cloud USA common synchronization completed



then stop there, never really start, always "0 agent of xxxx used".

it was working before, but since last Friday, it's not working.

 
If I use 1min OHLC, then it will work, but not work for real tick, it used to work with real tick, so what is the problem?