my mailchimp integration on my forms will not connect

Hi everyone,

After a long e-mailchain with Squarespace customer support they said that I could ask the forum for help. So here I am hoping you guys have the answer.

Long story short, suddenly my forms (there's one on almost every page) stopped saving changes I made, especially connecting the form to Mailchimp. Each time I would get a 'saving error', and when I changed the layout of the form, the change wouldn't show up after saving.

After contact with Squarespace customer service I've tried close to everything. I've tried:

• Changing the forms on different browsers, computers, wifi networks.
• Updating my browser (chrome), deleting cache/cookies
• Disable extensions/add ons
• Disabling scripts 
• Disconnecting and reconnecting Mailchimp 
• Deleting code injection

It could be that my code in the code injection is creating this problem, causing the forms to not save properly.

I've also noticed that other integrations (Google Ads/Analytics, Leadfeeder, etc.) aren't working properly.

The codes are put in the images to not make te message too long.

If a magical expert could help me, that would be great!