is there someone could tell me the reason and how to fix it?

Try using a vpn, this often fixes the issue. 

why did you delete my another post？

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WHY？ why did you delete it？ Had I  broken your rules ？

Because you made multiple posts about the same issue, there's no need for that. 

Now, if you have tried a vpn and it didn't work you should then try to close all instances of Raid with task manager and then launch Raid again. It seems to be creating multiple instances of the game and failing to load. 

OK, thank u, I will try again. And I will tell you the result that it does work or not. Thank u very much.

it seems not useful. 

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When I shut down the running task, the whole game was shut down. And some branch tasks cannot be closed. When one is turned off, the play platform is also turned off, and this interface appears.

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After logging in again, this screen still appears. 

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What puzzles me is that I can log in to PC with other accounts. Only my problematic account can only play on my mobile phone, not on PC.

That puzzles me too, I guess the next step is to open a ticket here. 

https://mobile-support.plarium.com/hc/en-us/requests/new?ticket_form_id=360000007492

and sadly today,all my accounts can't load in the game. it will make me mad ,plz help me.

I did, see above. 

I think I know how to solve it. My account can't log in to the PC all the time. I can't use many kinds of VPN. VPN may be useful, but it does not work for me. With the network accelerator, my login problem is solved.Later, I bought an accelerator and it seems that I can log in. In the final analysis, it is the network. But some time ago, I could log in without an accelerator. Now I have to pay dozens of yuan a month for this accelerator.

I think you can also find a toll accelerator in your country to use. It may be useful. If it doesn't work, you can refund it. Of course, I still hope that the plarium can further improve the client, so that we can enter the game without an accelerator. It's best to look forward to your success.thank you.please tell me the result if it does work  or not.

You can also explain my method to those who have other questions

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Because your account will have a lot of configuration information, you need a network accelerator to download this information for the first time. If you don't use the network accelerator, it will be stuck in the login interface. After downloading, you can log in to the game smoothly without using the network accelerator. I think this is the reason for the problem. I'd like to share it with you. Please tell me if it works or not.

Oh,  I almost forgot to tell you that I use Netease UU accelerator.

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