I get 503 error when logging in to Web Admin Console

#1
Hi,

I have been getting error 503 when I want to log into Web Admin Console for a while. Login page never opens. I didn't care much because there was no problem with the sites, but now I need to log in to Web Admin.

I'm using Centos 7. There are the following records in the error log file:

Code:
2020-06-04 23:46:07.320161 [NOTICE] [LocalWorker::workerExec] VHost:xxxx.com suExec check uid 99 gid 99 setuidmode 0.
2020-06-04 23:46:07.320240 [NOTICE] [LocalWorker::workerExec] Config[xxxx.990]: suExec uid 99 gid 99 cmd /usr/local/lsws/lsphp7/bin/lsphp, final uid 99 gid 99
2020-06-04 23:46:07.321194 [NOTICE] [xxxx.990] add child process pid: 1558.
2020-06-04 23:46:08.779439 [NOTICE] [LocalWorker::workerExec] VHost:_AdminVHost suExec check uid 997 gid 99 setuidmode 2.
2020-06-04 23:46:08.779568 [NOTICE] [LocalWorker::workerExec] VHost:_AdminVHost suExec check uid 997 gid 99 setuidmode 2.
2020-06-04 23:46:08.779679 [NOTICE] [LocalWorker::workerExec] VHost:_AdminVHost suExec check uid 997 gid 99 setuidmode 2.
2020-06-04 23:46:08.779772 [NOTICE] [IP:16230:HTTP2-1#_AdminVHost] oops!  503 Service Unavailable
2020-06-04 23:46:08.779804 [INFO] [IP:16230:HTTP2-1] Content len: 0, Request line:
GET / HTTP/1.1
2020-06-04 23:46:16.737741 [NOTICE] [LocalWorker::workerExec] VHost:xxxx.com suExec check uid 99 gid 99 setuidmode 0.
2020-06-04 23:46:16.737810 [NOTICE] [LocalWorker::workerExec] Config[xxxx.990]: suExec uid 99 gid 99 cmd /usr/local/lsws/lsphp7/bin/lsphp, final uid 99 gid 99
2020-06-04 23:46:16.739068 [NOTICE] [xxxx.990] add child process pid: 1605.
2020-06-04 23:46:21.654147 [NOTICE] [LocalWorker::workerExec] VHost:xxxx.com suExec check uid 99 gid 99 setuidmode 0.
2020-06-04 23:46:21.654227 [NOTICE] [LocalWorker::workerExec] Config[xxxx.990]: suExec uid 99 gid 99 cmd /usr/local/lsws/lsphp7/bin/lsphp, final uid 99 g$
2020-06-04 23:46:21.655053 [NOTICE] [xxxx.990] add child process pid: 1626.
 
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