can someone help me with this?

Archived
1

can someone tell me what to do in this type of error?

2

The error is telling you that those fields do not exist on ‘content node’.

You have to add those fields before setting them.

contentNode.addfield("descriptiontext","string",true)
contentNode.addfield("posterurl","string",true)
contentNode.addfield("titletext","string",true)

https://developer.roku.com/docs/references/brightscript/interfaces/ifsgnodefield.md