@gkesh This is suggesting to downgrade lessc to a version 3.0.4 Use the following command
sudo npm install -g less@3.0.4 less-plugin-clean-css
After installation Restart odoo service. Thanks
@gkesh This is suggesting to downgrade lessc to a version 3.0.4 Use the following command
sudo npm install -g less@3.0.4 less-plugin-clean-css
After installation Restart odoo service. Thanks