Fan automation based on light status?

I have a radon mitigation fan running 24/7 but it is annoying when I am in my basement shop.  I decided to build a simple automation to turn it off any time my shop light is on. 
The shop light is lighting_38
The shop light status can be read on lighting_38_status
The fan is on a Shellyplug which is lighting_302

I have verified that both the light and the fan can be operated by a lighting command in the command line of Myserver6 and if I look up the status variable I can see it changes when the light status changes.  Also, in my lighting floorplan, the shop goes gray (indicating a light is on) whenever that light is on so I know that Myserver knows how to respond to the status of that light.

I'd add a screenshot of the automation but this forum software is the pits, but that's a different topic.

Under "Automation Rule Conditions" I wrote:
WHEN:
{{Lighting_38_status}}=on

Under "Automation Rule" Actions I wrote:
Macro|
Lighting|302~off!
WebCmd|all~Toast|warning~Radon Fan Notification~The Shop light is {{lighting_38_status}}~10000!

Any ideas what is wrong with my syntax?  BTW, I also wrote a second automation to turn the fan back on whenever that light is turned off.  I'm sure it could all be done in one automation but I'm not a programmer.  One thing at a time while I'm learning.
Thanks,
 

See this example...the DelVariable gets rid of the "old" message after it has displayed (a reset)

Macro|
WebCmd|all~Toast|warning~SmartRemote8~SmartRemote8 is on charge. {{smartremote_battery_smartremote8}}%~5000!
DelVariable|message_1

Is the automation event firing? What's in the log? What's it getting done once fired vs, not getting done? Do you see the Toast message?

Nothing happens at all.
I just checked the log. I see there is an error.

"ERROR · Automations.LoadRules - Cannot parse [AND:{{Lighting_38_status}}=on] in rule radon off "

This is what is in the Automation Rule Conditions:

WHEN:
{{Lighting_38_status}}=on

graydon@gdsamps.com wrote:

Nothing happens at all.
I just checked the log. I see there is an error.

"ERROR · Automations.LoadRules - Cannot parse [AND:{{Lighting_38_status}}=on] in rule radon off "

This is what is in the Automation Rule Conditions:

WHEN:
{{Lighting_38_status}}=on

did you copy / paste that variable name?  ie: is L or l?
 

Good catch.  The correct spelling for that variable is with a lower case "l" as in "lighting_38_status"
I still get the same error though so that was not the only problem.
I deleted the colon after "WHEN" and that eliminated the error message but it still doesn't work.

 

The parser is a bit picky. It needs white space around the operators

change
WHEN:
{{Lighting_38_status}}=on

to
WHEN:
{{lighting_38_status}} = on