Google Photos Stream to PPM

On Android Phone the Google Photos App shows the option to stream or cast a picture. If I press this button the PPM becomes available as a receiver. If I select the PPM the cast/stream symbol turns blue. This usually means that sender side assumes that the stream is working. But the ppm shows no reaction.

Does anyone how I can stream/cast pictures from the Google photos app to the ppm?

General Screen Mirroring does not work in my environment with the current state of the firmware. I do not have a 5Ghz WiFi to use the workaround. Do you thing this could be the same reason that blocks to strem/cast a single picture?

After the Firmware Update to 1.1.0 it works. I can now show pictures from my smartphone via the cast symbol on the ppm.