@P_Rat98 The error above is saying there is an issue with the Schema Name in your record reader or writer. When inside the properties for Convert Record, click the --> arrow through to the reader/writer and make sure they are configured correctly. You will need to provide the correct schema name (if it is already an existing attribute) or provide the schema text.
If this answer resolves your issue or allows you to move forward, please choose to ACCEPT this solution and close this topic. If you have further dialogue on this topic please comment here or feel free to private message me. If you have new questions related to your Use Case please create separate topic and feel free to tag me in your post.
Thanks,
Steven @ DFHZ