Hi @Anonymous,
I have made a test and the issue is confirmed on my side.
The image the Camera control captured is actually a image Data Url, the standard format the image Data Url the Camera control captured as below:
data:image/jpeg;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAA
CNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwA
AAABJRU5ErkJggg==
So you need to convert the Data Url into a binary data within your flow using the dataUriToBinary() function, but the image the Add picture control captured is not a image Data Url, the image data format the Add picture control captured as below:
appres://blobmanager/0665075483e44d7ea1af450f3a61b472/1
So the dataUriToBinary() function executes failed.
If you want to upload the image captured via the Add picture control into SharePoint library folder, please check and see the following blog:
http://repointtechnologies.com/saving-images-from-powerapps-to-sharepoint/
In addition, please check and see if the following video would help in your scenario:
https://www.youtube.com/watch?v=mp-8B1fLrqs
Best regards,
Kris