** Error: (vsim-8754) test.sv(59): Actual input arg. of type ‘class work.top1/wdt_env’ for formal ‘sequencer’ of ‘start’ is not compatible with the formal’s type ‘class mtiUvm.uvm_pkg::uvm_sequencer_base’.
This looks like you are trying to execute a sequence on a sequencer which is not compatible.
Could you please show the definition of your sequencer and the corresponding sequence?.