No. The FLOW button does NOT exist in the web application. Very frustrating for those of us who use older versions of Windows for which Microsoft doesn't have a usable version of the application.
... and I tried it from another machine and have the same problem that everyone else is complaining about. It won't accept the image from the collection. It wants TEXT for file content. Microsoft? You able to tell me anything?
Hi, I know it's late to give some explanation, but anyway.
You have to convert the base64 image to a binary file for SharePoint to accept it :
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