Is possible to restrict or limit the access to the Files App?

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a colleague pointed me to the option of limiting the transfers as described in Customization — Open OnDemand 2.0.20 documentation .

The official docs suggest to edit /etc/ood/config/apps/shell/env and this link suggests to edit /etc/ood/config/apps/files/env

I have tried to edit both files:

$> cat /etc/ood/config/apps/files/env
FILE_UPLOAD_MAX=0

$> cat /etc/ood/config/apps/shell/env
FILE_UPLOAD_MAX=0

And then I did systemctl try-restart httpd24-httpd.service httpd24-htcacheclean.service but I can still upload files using the Files app. Am I doing something wrong?

I am using ondemand-2.0.23-1.el7.x86_64 installed using RPMs on Centos7.9