Waveform simulation not displaying output.

I am using ModelSim 19.1 and it intel FPGA. I tried to compile and simulate my program for bit adders and it showed a white blank window with no black simulation graph. I know that I am supposed to get a black window with a blank simulation graph with graphed signal lines for the outputs. Since I could not get the output for the waveform simulation for the adder, and I could not fix the graph by adding a wave, after compiling my program and simulating it, I would encounter an issue that seemed permanent to not solve. I wonder who would know how to fix Intel FPGA ModelSim 19.1 graph problems. I would share my screen of the waveform simulation, and I would show the issue with the waveform simulation display graph, and that it is not displaying the output for the bit-adder. I know that if the waveform simulation graph is fixed, I would be able to simulate any adder or fully designed VHDL component.