I am facing trouble while trying to start opmanager client

through web client i am getting error: this page can not be displayed. i tried StartOpManagerClient.bat and it showed me error check whether the server is running

then i tried StartOpManagerServer.bat and it showed me that license is invalid although it is valid and it was working just 2 days ago

then i tried another port ( WMI - 135) while using StartOpManagerClient referring to the below link

https://support.zoho.com/portal/manageengine/helpcenter/articles/port-used-by-opmanager

i get message that client is initializing but without any further action taken

 

i tried as well RepairDB.bat but in vain

kindly can you assist and advise regarding this issue

Regards