No hourly change echo "$DESKTOP_SESSION" plasma

[Silesse]

No hourly change echo "$DESKTOP_SESSION" plasma

[Silesse]

Changing my user (siva) cron to:
#!/bin/bash
0 * * * * env TERM=xterm-256color PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl DISPLAY=:0 DESKTOP_SESSION=plasma DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus" /usr/bin/dwall -s sol

results in the following from systemctl cronie.service ...
● cronie.service - Periodic Command Scheduler
Loaded: loaded (/usr/lib/systemd/system/cronie.service; enabled; preset: disabled)
Active: active (running) since Tue 2023-09-26 21:42:17 BST; 31min ago
Main PID: 626 (crond)
Tasks: 1 (limit: 6946)
Memory: 3.0M
CPU: 345ms
CGroup: /system.slice/cronie.service
└─626 /usr/bin/crond -n

Sep 26 22:00:01 hplaptop14dk0xxx CROND[8025]: (siva) CMDOUT ([*] Using style : sol)
Sep 26 22:00:01 hplaptop14dk0xxx CROND[8025]: [141B blob data]
Sep 26 22:00:01 hplaptop14dk0xxx CROND[8025]: [22B blob data]
Sep 26 22:00:01 hplaptop14dk0xxx CROND[8025]: (siva) CMDEND (env TERM=xterm-256color PATH=/usr/local>
Sep 26 22:00:01 hplaptop14dk0xxx CROND[8025]: pam_unix(crond:session): session closed for user siva

The wallpaper still does not change
Autostart is working just fine

(edit)
Trying to make a systemd service gives me an Invalid environment assignment (ignores /usr/bin/dwall , -s , and sol)
I'm guessing there's another env variable I need? Or maybe I've just typed one wrong and staring at them for so long has driven me crazy...