Step 1
First, visit your Currency Converter setup page and double check settings and setup there.
You will need to insert the Monto global script from that page into your Webflow Site settings > Custom Code > Head code section (if it is not already there from another app.)
This is usually all you need to get Currency Converter up and running on an Ecommerce site!
Check what your site looks like using a VPN (Free app here).
If you're still seeing an error, then the most common thing is a formatting issue in Webflow.
Step 2 (Ecommerce Site)
Check your currency format settings in the Webflow designer Settings > Ecommerce > General tab.
It should look something like this:
Be sure your "Amount Format" uses either:
Comma thousand separator (see above)
No thousand separator
The following formats will NOT work:
Space thousand separator
Period thousand separator
Step 2 (CMS Site)
Follow the instructions here for formatting: https://help.monto.io/en/articles/6395651-using-multi-currency-outside-of-webflow-ecommerce
Be sure to wrap the price in a span tag with the custom attribute mentioned in the article.
Format the price using no thousand separators and with a space between the symbol, price, and currency code.
GOOD EXAMPLE:
$ 1200.00 USD OR € 1200,00 EUR
WHAT NOT TO DO:
$1,200.00 OR €1.200,00