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 Stages Solo 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 Stages Solo 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 Stages Power app
Changing the batteries in the Stages Power meter (971-0100 & 971-0101)
Changing the batteries in the Gen. 3 Stages indoor power meter (971-0103)