getting permission denied errors with cronjobs and logs on rpi

Hell everyone.

I am running a raspberry pi 3B+. I have a a cronjob that runs a script (which seems to work fine) but when I look at the syslog I see errors, which you can find below.

I can't really figure out what is wrong, and I wonder if you guys do know. my mail (cat /var/mail/pi) shows nothing.

I do run log2ram, if that makes any difference..

my crontab looks like this:

0 */4 * * * sh /home/pi/Projects/refresh-web-os.sh

The script it runs looks like this:

#!/bin/sh

sessionToken=$( ssh -i <<CREDENTIALS>> -o StrictHostKeyChecking=no -p <<PORT>> <<SSH_ADDRESS> cat /var/luna/preferences/devmode_enabled )

if [ -z "${sessionToken}" ]; then
  echo "sessionToken is empty"
  sessionToken=$(cat /tmp/webos_devmode_token_tv.txt)
else
  echo "saving session token in temporary file (/tmp/webos_devmode_token_tv.txt)"
  echo ${sessionToken} > /tmp/webos_devmode_token_tv.txt
fi

if [ -z "${sessionToken}" ]; then
  echo "Unable to get token" >&2
  exit 1
fi

checkSession=$(curl --max-time 3 -s "<<CURL_CALL>>")

echo $checkSession

and the syslog (grep cron /var/log/syslog -B 5 -A 5) looks like this:

Feb  1 04:00:01 raspberrypi CRON[23440]: (pi) CMD (sh /home/pi/Projects/refresh-web-os.sh)
Feb  1 04:00:01 raspberrypi CRON[23441]: (root) CMD (   PATH="$PATH:/usr/sbin:/usr/local/bin/" pihole updatechecker local)
Feb  1 04:00:07 raspberrypi cron[413]: 2022-02-01 04:00:07 1nEjOp-00066P-0e Cannot open main log file "/var/log/exim4/mainlog": Permission denied: euid=112 egid=119
Feb  1 04:00:07 raspberrypi cron[413]: 2022-02-01 04:00:07 1nEjOp-00066P-0e <= pi@raspberrypi U=pi P=local S=717
Feb  1 04:00:07 raspberrypi cron[413]: 2022-02-01 04:00:07 1nEjOp-00066P-0e Cannot open main log file "/var/log/exim4/mainlog": Permission denied: euid=112 egid=119
Feb  1 04:00:07 raspberrypi cron[413]: exim: could not open panic log - aborting: see message(s) above
Feb  1 04:00:07 raspberrypi exim[23461]: 2022-02-01 04:00:07 1nEjOp-00066P-0e <= pi@raspberrypi U=pi P=local S=717
Feb  1 04:00:07 raspberrypi exim[23461]: 2022-02-01 04:00:07 1nEjOp-00066P-0e Cannot open main log file "/var/log/exim4/mainlog": Permission denied: euid=112 egid=119
Feb  1 04:00:07 raspberrypi exim[23461]: exim: could not open panic log - aborting: see message(s) above
Feb  1 04:00:07 raspberrypi CRON[23439]: (pi) MAIL (mailed 141 bytes of output but got status 0x0001 from MTA#012)