Plesk server showing errors for any action like removing, uploading projects and sending email

I am facing this issue with Windows Plesk web-hosting.Errors are as below -

A] While generating new mail id -

Error: Unable to update the mail account properties:mailmng failed:   
There are no domains for post office:mylifebuddy.com [mylifebuddy.com]
at (MailEnable::MailEnableMailName::MailEnableMailName line 75)
at execute console command --add-mailname(vconsoleapp::start line 100)
at execute "C:\Program Files (x86)\Parallels\Plesk\admin    
\bin\mailmng.exe" --add-mailname "--domain-name=mylifebuddy.com"   
"--mailname=kedar" "--password=*"(vconsoleapp::run line 117)

B] while adding new .war file( Java application) -

Error: Unable to start up Java application: Unknown error 0xC00CE508 
(COM Error C00CE508) at addDeleteFile 'C:\Program Files (x86)\Parallels
\Plesk\var\tomcat\psa-webapps\myeduguru.in\EduClasses.war' for service 
'Tomcat7' at (PleskSrvClient::addDeleteFile line 571) at 
startWebApp(myeduguru.in, EduClasses)(TomcatManager::startWebApp line 
388) at execute console command --install-webapp(vconsoleapp::start line 
100) at execute "C:\Program Files (x86)\Parallels\Plesk\admin
\bin\tomcatmng.exe" --install-webapp "--vhost-name=myeduguru.in" 
"--webapp-name=EduClasses" "--aliases=tmp9339.tmp"(vconsoleapp::run line 
117) 

So basically these are few examples but I am getting errors for each and every activity. I am not getting any support from either the hosting provider or Plesk support. Any help is really appreciated. Thanks in advance.

Please visit: https://plus.google.com/116185647783529747508/posts/DWnYCiAd2df From Remote desktop connection, I renamed .xml file. It worked for uploading and removing files.

But the email id creation and sending emails functions are still not working.