using ground gives error in PV array in Simulink 2020

Hi everyone,

I was trying to model different faults in MATLAB Simulink. At first, i used 2016b version and used the below model and I had no problem. But since I updated my MATLAB to 2020b version I get this error:"Connection involving ports of 'PV_array_test/Gnd' and 'PV_array_test/Solver Configuration1' is invalid because the ports are not compatible."

In 2016 version by GND connection had no problem but in 2020 version I cannot connect GND to my diagram. Also, of cource, when I delete GND componnent I give error which the model cannot converge to an answer.

I was wondering, how can I solve my problem. Is there any converter, which can help me to use GND for my model.