When the “Pedal to Continue” message doesn't go away after pedaling, this is an indication that the power meter on the bike is not paired with the tablet. 

Reboot the StagesSolo tablet by unplugging the power cable from the bike and plugging it back in. If this does not solve the issue, re-pair the power meter to the tablet.

Pairing the power meter to the StagesSolo tablet

This is a good opportunity to ensure the power meter firmware is up to date and change the power meter batteries if needed.

Firmware updates using the StagesPower app

Changing the batteries in the Stages Power meter