Issue with Uipath and Get IBM Notes Mail Messages

Dear All
Can You help me with below issue?
I’m trying to download attachments from mails in Lotus notes.
While running I’m getting below error message
“For Each: Unable to cast object of type ‘System.Net.Mail.MailMessage’ to type ‘System.Collections.Generic.List`1[System.Net.Mail.MailMessage]’.”

My flow looks like that