Why does the DCC prompts "Live is not supported in picture/video mode"?

The general situation is: after entering the picture/video mode in D5, and then performing the increase or decrease model operation in DCC and transmitting new data (real-time update or manual update) to D5, this error will occur.

This is an expected prompt.

In this case, exit the picture/video mode, and then re-associate the synchronization.