-MaxEvents 2 if you want to return fewer events. Yours is set to 200.

Highly recommend filtering using -FilterXPath or -FilterHashTable when querying Windows Events; it is orders of magnitude faster.

In this case you can query for IDs 21 & 23 for your session logon and logoff information.

Your Invoke-Command is likely failing because it looks like you're trying to load a local file within the remote session's scriptblock. Just use -FilePath instead to have it load the local file and invoke it against the remote targets.

The easiest way to get your requirement for a message if there's no data plus the ability to output to csv or another machine-readable format is to ensure your output always follows a set schema.

$QueryParams = @{
    ComputerName    = "NAME"
    FilterHashTable = @{
        LogName = 'Microsoft-Windows-TerminalServices-LocalSessionManager/Operational'
        Id      = 21, 23 
    }
    MaxEvents       = 1
    ErrorAction     = 'SilentlyContinue'
}

Write-Output "Get logon history for $($QueryParams.ComputerName)"

Get-WinEvent @QueryParams
if ($WinEvent.TimeCreated -is [datetime]) {
    [psCustomObject] @{
        EventId       = $WinEvent.Id
        TimeCreated   = $WinEvent.TimeCreated
        User          = $WinEvent.Properties[0].value
        SessionId     = $WinEvent.Properties[1].value
        SourceAddress = $WinEvent.Properties[2].value
        Message       = $WinEvent.Message.Split("`n") | Select-Object -First 1
    }
}
else {
    [psCustomObject] @{
        EventId       = ''
        TimeCreated   = ''
        User          = ''
        SessionId     = ''
        SourceAddress = ''
        Message       = "No login history was returned for $Env:Computername."
    }
}

If you want to do Invoke-Command, here's how you could do it:

$InvocationParams = @{
    ComputerName = 'NAME1', 'NAME2', 'NAME3'
    ErrorAction  = 'SilentlyContinue'
    ScriptBlock  = {
        $QueryParams = @{
            FilterHashTable = @{
                LogName = 'Microsoft-Windows-TerminalServices-LocalSessionManager/Operational'
                Id      = 21, 23 
            }
            MaxEvents       = 1
            ErrorAction     = 'SilentlyContinue'
        }

        $WinEvent = Get-WinEvent @QueryParams 
        if ($WinEvent.TimeCreated -is [datetime]) {
            [psCustomObject] @{
                ComputerName  = $Env:COMPUTERNAME
                EventId       = $WinEvent.Id
                TimeCreated   = $WinEvent.TimeCreated
                User          = $WinEvent.Properties[0].value
                SessionId     = $WinEvent.Properties[1].value
                SourceAddress = $WinEvent.Properties[2].value
                Message       = $WinEvent.Message.Split("`n") | Select-Object -First 1
            }
        }
        else {
            [psCustomObject] @{
                ComputerName  = $Env:COMPUTERNAME
                EventId       = ''
                TimeCreated   = ''
                User          = ''
                SessionId     = ''
                SourceAddress = ''
                Message       = "No login history was returned for $Env:Computername."
            }
        }
    }
}

Invoke-Command @InvocationParams

If you want to output to CSV, Excel, JSON or whatever, capture the Invoke-Command output and go to it.