utm: Invalid value for zone)

[nihanyue]

Hi, I’m running pyfvcom_preprocessing_example, but ran into an error:
CRSError: Invalid projection: +proj=utm +zone=20N, +ellps=WGS84 +datum=WGS84 +units=m +no_defs +type=crs: (Internal Proj Error: proj_create: Error 1027 (Invalid value for an argument): utm: Invalid value for zone)
Idid not change any code in this file and I checked my pyproj and it's well-functioned, what should I do to successfully run this example?

[123mlt]

use python3.6

[marius-dewar]

Please use the main repository linked in the readme file that has recently been updated.