The requested URL / manager/ispmgr was not found on this server.
 

Yesterday it was all right, now I can not go into the control system ISPMANAGER (ip / manager) browser for a long time waiting for then says, "Not Found
The requested URL/manager / ispmgr was not found on this server. "Nothing has changed on the server, tell me how to get into the control panel?

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Вчера было все нормально, сейчас не могу зайти в систему управления ISPMANAGER (ip/manager) браузер очень долго ждет потом пишет, "Not Found
The requested URL /manager/ispmgr was not found on this server." Ничего на сервере не менялось, подскажите, как попасть в панель управления?

tried to reboot the server, does not help
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пробовал перезагружать сервер, не помогает

you should take a look at ispmgr.log and the log of your apache. There should be some message reporting about some error.