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Does your `uut` module have something like this in the interface definition?
````ifdef USE_POWER_PINS
    inout vdda1,        // User area 1 3.3V supply
    inout vdda2,        // User area 2 3.3V supply
    inout vssa1,        // User area 1 analog ground
    inout vssa2,        // User area 2 analog ground
    inout vccd1,        // User area 1 1.8V supply
    inout vccd2,        // User area 2 1.8v supply
    inout vssd1,        // User area 1 digital ground
    inout vssd2,        // User area 2 digital ground
`endif```

Error is regarding caravel uut in ring_counter_tb.v file and  all those ports  are present inside caravel module.