const response = await fetch(generalAddress + categoriesAddress, {
            'headers': {
                'Accept': acceptMultipart
            },
            'method': 'GET'
        });
        const formData = await response.formData();
        console.log(formData);

This simple code block always result in Type Error: Failed to fetch.
If I log the first variable (to avoid formData function) I successively retrieve a response.
No matter what I try I always get the same error when trying to use formData().

I would love to get some help from more advanced devs. I need to successively get form data from a response.
TIA

Please don’t ask why I use from data instead of XML or JASON

Despite searching the documentation or forums I didn’t find a relevant topic, not even to mention a solution. It seems like no-one really uses form data on responses