springboard error

Im working on getting my channel to run with ads

' ********** Copyright 2016 Roku Corp.  All Rights Reserved. **********

' 1st function that runs for the scene component on channel startup
sub init()
  'To see print statements/debug info, telnet on port 8089
  m.Image         = m.top.findNode("Image")
  m.Details       = m.top.findNode("Details")
  m.Title         = m.top.findNode("Title")
  m.Video         = m.top.findNode("Video")
  m.SpringDetails = m.top.findNode("SpringBoardDetails")
  m.LabelList     = m.top.findNode("LabelList")
  m.CategoryLabel = m.top.findNode("CategoryLabel")
  m.RuntimeLabel  = m.top.findNode("RuntimeLabel")
  m.Video.ObserveField("state","OnVideoPlayerStateChange")
  m.Title.font.size = 40
  m.CategoryLabel.color = "#333333"
  m.Title.color = "#333333"
  m.Details.color = "#444444"
  m.RuntimeLabel.color = "#333333"
end sub

' set proper focus to buttons if Details opened and stops Video if Details closed
Sub onVisibleChange()
    ? "[DetailsScreen] onVisibleChange"
    if m.top.visible = true then
        m.buttons.jumpToItem = 0
        m.buttons.setFocus(true)
    else if m.videoPlayer <> invalid
        m.videoPlayer.visible = false
        m.videoPlayer.control = "stop"
        m.poster.uri=""
        m.background.uri=""
    end if
End Sub

' set proper focus to Buttons in case if return from Video PLayer
Sub OnFocusedChildChange()
    if m.top.isInFocusChain() and not m.buttons.hasFocus() and not m.videoPlayer.hasFocus() then
        m.buttons.setFocus(true)
    end if
End Sub

' set proper focus on buttons and stops video if return from Playback to details
Sub onVideoVisibleChange()
    if m.videoPlayer.visible = false and m.top.visible = true
        m.buttons.setFocus(true)
        m.videoPlayer.control = "stop"
        'clear video player content, for proper start of next video player 
        m.videoPlayer.content = invalid
        'remove video player
        m.top.removeChild(m.videoPlayer)
    end if
End Sub

' event handler of Video player msg
Sub OnVideoPlayerStateChange()
    if m.videoPlayer.state = "error"
        ' error handling
        m.videoPlayer.visible = false
    else if m.videoPlayer.state = "playing"
        ' playback handling
        playContent()
    else if m.videoPlayer.state = "finished"
        m.videoPlayer.visible = false
    end if
End Sub



sub playContent()
    content = m.buttons.content
    if content <> invalid then
        m.video.content = content
        m.video.visible = false

        m.PlayerTask = CreateObject("roSGNode", "PlayerTask")
        m.PlayerTask.observeField("state", "taskStateChanged")
        m.PlayerTask.video = m.video
        m.PlayerTask.control = "RUN"
    end if
end sub

sub taskStateChanged(event as Object)
    print "Player: taskStateChanged(), id = "; event.getNode(); ", "; event.getField(); " = "; event.getData()
    state = event.GetData()
    if state = "done" or state = "stop"
        exitPlayer()
    end if
end sub


' on Button press handler
Sub onItemSelected()
    ' first button is Play
    if m.top.itemSelected = 0
        m.videoPlayer = CreateObject("roSGNode", "Video")
        m.videoPlayer.id="videoPlayer"
        m.videoPlayer.translation="[0, 0]"
        m.videoPlayer.width="1280"
        m.videoPlayer.height="720"
        m.videoPlayer.content   = m.top.content

        'show video player
        m.top.AppendChild(m.videoPlayer)

        m.videoPlayer.visible = true
        m.videoPlayer.setFocus(true)
        m.videoPlayer.control = "play"
        m.videoPlayer.observeField("state", "OnVideoPlayerStateChange")
        m.videoPlayer.observeField("visible", "onVideoVisibleChange")

    end if
End Sub

' Content change handler
Sub OnContentChange()
    m.description.content   = m.top.content
    m.description.Description.width = "770"
    m.poster.uri            = m.top.content.hdBackgroundImageUrl
    m.background.uri            = m.top.content.hdBackgroundImageUrl
End Sub

'///////////////////////////////////////////'
' Helper function convert AA to Node
Function ContentList2SimpleNode(contentList as Object, nodeType = "ContentNode" as String) as Object
    result = createObject("roSGNode",nodeType)
    if result <> invalid
        for each itemAA in contentList
            item = createObject("roSGNode", nodeType)
            item.setFields(itemAA)
            result.appendChild(item)
        end for
    end if
    return result
End Function

Function OnkeyEvent(key, press) as Boolean
    ? ">>> Details >> OnkeyEvent"
    result = false
    if press AND key = "back" AND m.videoPlayer <> invalid AND m.videoPlayer.visible 
        m.videoPlayer.visible = false
        result = true    
    end if
    return result
End Function

Yet I keep getting these errors

Invalid value for left-side of expression. (runtime error &he4) in pkg:/components/SpringBoard.brs(117)                 117:     m.description.content   = m.top.content