I see that you are encountering a Jacobian configuration error in the "Lowpass Resampler" while attempting to linearize a PLL.
I was also facing a similar issue in one of my workflows.
After some investigation, I found that the error occurs when the Bode Plot block tries to linearize the nonlinear PLL system. In order to obtain the frequency response, I conducted a frequency response estimation using the "Estimation" tab in the "Model Linearizer" app. You can refer to the following post in the MATLAB Answers forum to get more details about this: https://www.mathworks.com/matlabcentral/answers/684813-is-it-possible-to-linearize-a-phase-lock-loop-using-the-linear-analysis-gui
I hope the above resource helps you with your workflow to linearize the model and obtain the frequency response.
