Up to five devices, such as smartphones/tablets, etc., can sign in to PCS. However, only the device that signs in first using PCS Manager can use all the functions of PCS and configure PCS settings.
If [Read-Only Access] appears when you sign in, another device signed in first and the following functions will not be available.
Storing or deleting images / changing data on PCS
Output to a TV, etc., via HDMI
Settings menu
To enable full functional use of PCS, have the first device sign out, then sign in immediately with another device. See Signing out.
If no other device has signed in, you might have signed in with the same device twice.
Force-stop PCS Manager, then try signing in 30 seconds later.