SharePoint Online MobileExcelWebAccess Feature - Unable to create site using custom template

I am sure you would have got this error suddenly while creating sites using custom template in SharePoint Online.
Error: MobileExcelWebAccess Feature e995e28b-9ba8-4668-9933-cf5c146d7a9f Not activated

Microsoft is unsure about the issue but there is a fix. 

Prerequisites:
- You should be an Administrator 

- Windows PowerShell

- SharePoint Online Management Shell

- SharePoint Online Client Components SDK (Download: http://www.microsoft.com/en-us/download/details.aspx?id=42038)

Steps: 

1. Open Windows PowerShell in Administrator mode and execute the script

         Set-ExecutionPolicy -ExecutionPolicy Unrestricted

2. Open SharePoint Online Management Shell in Administrator mode and execute the script

$clientDll = [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client")
$runtimeDll = [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client.Runtime")


$url = "https://<your site collection url>"


$cred = get-credential

$clientContext = New-Object Microsoft.SharePoint.Client.ClientContext($url) 
$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($cred.username, $cred.password) 
$clientContext.Credentials = $credentials 

if (!$clientContext.ServerObjectIsNull.Value) 
{ 
    Write-Host "Connected to SharePoint site: '$Url'" -ForegroundColor Green 
}

$clientContext.Site.Features.Add('e995e28b-9ba8-4668-9933-cf5c146d7a9f',$true,[Microsoft.SharePoint.Client.FeatureDefinitionScope]::None)

$clientContext.ExecuteQuery()

Note: Do not forget to replace the $url with your site collection url

Alternatively, you shall save the above #2 script in .ps1 file and execute it.
To execute the .ps1 in SharePoint Online Management shell;
- Open SharePoint Online Management Shell in Administrator mode
- Go to the directory where you have .ps1 file
- Type .\<file name>
- A prompt will be displayed that asks your credential (Administrator)

That's it !!!!!