Renamed Counter.v to use the upper case first letter. This allows the file to be used when building on case sensitive file systems. Strangely this wasn't a problem when using Ubuntu through WSL.
diff --git a/verilog/rtl/Utility/counter.v b/verilog/rtl/Utility/Counter.v
similarity index 100%
rename from verilog/rtl/Utility/counter.v
rename to verilog/rtl/Utility/Counter.v