[MSNoise] Issue in computing dtt

Hi everyone, I am new to msnoise therefore facing some issues. While trying to compute dtt, suddenly this message starts appearing in the terminal: "/home/zee/anaconda3/lib/python3.9/site-packages/scipy/optimize/minpack.py:833: OptimizeWarning: Covariance of the parameters could not be estimated warnings.warn('Covariance of the parameters could not be estimated'," Can anyone tell me the reason behind it and how to sort out this issue. Regards, Faisal Umer