Innovus post CTS Timing Analysis issue

While performing the timing analysis after post-CTS. We are getting warnings on all input ports defined in our design.

 **WARN: (IMPESI-3095):  Net: 'CLK' has no receivers. SI analysis is not performed.
**WARN: (IMPESI-3095):  Net: 'RESET' has no receivers. SI analysis is not performed.
**WARN: (IMPESI-3095):  Net: 'UART_BAUD_SWITCHES_2' has no receivers. SI analysis is not performed.
**WARN: (IMPESI-3095):  Net: 'UART_BAUD_SWITCHES_1' has no receivers. SI analysis is not performed.

We've checked our design netlist, and all the required connections are present for the input ports through pads. We are using Innovus version: v21.12