ValueError: could not convert string to float: 'timeseries'

[chyannn06]

I am following the script of the tutorial. However, in the Preprocessing-Densities-Extracting the Density part, when it goes: extract_combined_grid(out_name_a+".gro", "dens/cond-a_wateraligned.xtc",
out_name_b+".gro", out_name_b+".xtc",
atomgroup="OH2",
write_grid_as="TIP3P",
out_name= "ab_grid_")

It raised "ValueError: could not convert string to float: 'timeseries' ”
I am not sure where I make it wrong.

[github-actions]

Congras on the first issue!