Detect and configure GNSS fails

[jpucheu]

Describe the bug
The configuration of the Zed_F9P gnss fails. Doing manually, it reveals that configure doesn't work because there is a problem with ubxtool.
If I run ubxtool -v, the system respond: ubxtool: failed to import gps, check PYTHONPATH

To Reproduce

sudo ./install.sh --detect-gnss --configure-gnss
user for RTKBase is: juan
################################
USB GNSS RECEIVER DETECTION
################################
/dev/ttyGNSS - u-blox_AG_-www.u-blox.com_u-blox_GNSS_receiver - 115200
GNSS RECEIVER DETECTED: /dev/ttyGNSS - u-blox_AG-_www.u-blox.com_u-blox_GNSS_receiver - 115200
################################
CONFIGURE GNSS RECEIVER
################################
ubxtool: failed to import pyserial
Traceback (most recent call last):
File "/home/juan/rtkbase/tools/sept_tool.py", line 7, in
from septentrio.septentrio_gnss.septentrio_cmd import *
File "/home/juan/rtkbase/tools/septentrio/septentrio_gnss/septentrio_cmd.py", line 2, in
from . serial_comm import SerialComm
File "/home/juan/rtkbase/tools/septentrio/septentrio_gnss/serial_comm.py", line 2, in
import serial
ModuleNotFoundError: No module named 'serial'
No Gnss receiver has been set. We can't configure
juan@raspberrypi:~ $ ubxtool --help
ubxtool: failed to import gps, check PYTHONPATH

Software/Hardware (please complete the following information):

• RTKBase release number 2.6.2
• OS: Raspberry pi OS Lite 64 bit (Debian Bookworm)
• SBC Raspberry pi Zero 2W
• GNSS Device: Ublox F9P
• Connection type: usb

[Stefal]

Hmm, that's strange.
If you enter python3 -m serial, do you get a list of the serial port?