Developer Mode - Returns Internal Server Error


I managed to install ERPNext 4.11 in production mode.

However, I wanted to put this setup into developer mode, so looking up forum, i found to put “developer” : 1 in site_config.json

But after putting this option and restarting supervisor, I get Internal Server Error.

I am not sure where to look for, for logs.

I see nothing coming in :


Nothing even in : nginx access / error log !!

Ok, Saw similar error elsewhere in forum.

Need to put , for the earlier line for the parser to continue looking for this option.