cmdstanpy- ERROR - error: error during processing Communication error on send

Hello!

I started training a prophet model for a timeseries forecasting problem, and once I started training & searching for the best hyperparameters I get the following output in terminal:

`
cmdstanpy - ERROR - Chain [1] error: error during processing Communication error on send
cmdstanpy - INFO - Chain [1] done processing
Optimization terminated abnormally. Falling back to Newton.
`
However the code seems to run fine and once the searching is done I get the best hyperparameters and start training with them.
The searching is done with Optuna for 4000 trials and the next param grid:
param_grid = {
"changepoint_prior_scale": trial.suggest_categorical(
"changepoint_prior_scale", [0.0001, 0.001, 0.01, 0.1, 0.5, 0.05, 0.9]
),
"seasonality_prior_scale": trial.suggest_categorical(
"seasonality_prior_scale", [0.01, 0.1, 1.0, 10]
),
"seasonality_mode": trial.suggest_categorical(
"seasonality_mode", ["multiplicative", "additive"]
),
"growth": trial.suggest_categorical("growth", ["linear"]),
"yearly_seasonality": trial.suggest_categorical(
"yearly_seasonality", [3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
)
Does anybody have any idea what this error suggest? Or if it affects my search in any ways? Thank you in advance :)