Can't curl a calendar using script-shell #3

I'm not entirely sure why, but trying to use curl to grab a calendar from a public url doesn't work when running trough script-shell.

• The script does work correctly when manually ssh'ing into the watch as ceres and run it using /home/ceres/script-shell/03_update-agenda.sh, showing the script itself is fine.
• script-shell does work correctly for turning on and off the wi-fi, making me believe it's more likely something specific to this scenario than an issue with script-shell not being correctly build or installed.

The contents of 03_update-agenda.sh are as follows. Of course, with redacted links and calendar names.

#!/bin/sh

url1="<URL>"
target1="/home/ceres/script-shell/1.ics"

url2="<URL>"
target2="/home/ceres/script-shell/2.ics"

# download and import calendar 1, overwrite old ones
echo "-> downloading calendar 1"
curl -o ${target1} ${url1} || exit 1

echo "-> importing calendar 1"
icalconverter import /home/ceres/script-shell/priv.ics -d || exit 1

# download and import together calendar 2, add on top
echo "-> downloading calendar 2"
curl -o ${target2} ${url2}  || exit 1

echo "importing work calendar"
icalconverter import /home/ceres/script-shell/work.ics || exit 1

# return success message
echo "-> Successfully imported calendars"
exit 0

It runs until it breaks after this line. As in, I get this echo and then the ERR ending.

# download and import calendar 1, overwrite old ones
echo "-> downloading calendar 1"
curl -o ${target1} ${url1} || exit 1

Seems that when running the script trough script-shell, the curl fails for some reason returning the exit 1. However, I don't know what the difference is between running the script in script-shell (which breaks) and running it as after ssh'ing into the watch as ceres (which works).

Tested on a catfish_ext.