Hi @nenandy , I believe because you are using 2 input parameter of type file , so while sending it from PowerApps, you need to specify the file input parameter. Example: When I click on 3 ellipses,

this is what i found:

So, in your code from PowerApps, use
SendEmail_flow.Run(.........,
{
file:
{
contentBytes: First(DataCardValue33.Attachments).Value,
name: First(DataCardValue33.Attachments).Name
}
},
{
file_1:
{
contentBytes: Last(DataCardValue33.Attachments).Value,
name: Last(DataCardValue33.Attachments).Name
}
})
Also make sure that these 2 input parameter are marked as required from Power Automate:

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I hope this helps.
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Thanks,
ANB