I have tried to replicate the same scenario and it is working fine as expected.
Try adding Trim at the end of folder path and Asset Name like
row(“OrchestratorFolder”).ToString.Trim in case there are additional spaces in the excel from which you are reading. Apart from that - I don’t foresee any reason for this error
Also try adding a message box with the folder name and see if it is coming as expected. One more thing you can check is whether the folder name is a subfolder or not. If that is tha case - you need to provide Folder\SubFolderName