Daci

I did the same as twobeatsahead two days ago, and can confirm it works.
I thought it was something in my Custom DNS section under the Google domain settings. I wiped all records out and only had the three required for domain verification...and nothing. It turned out it was the records under the Synthetic Records section. (Thank you Chris from SS support for pointing that out). 
Chris from Squarespace told me what record needed to be edited, and what it needed to be changed to. The issue is that a Google Workspace synthetic record can't be edited, it needs to be completely deleted (as mentioned above). Yes, it is scary, and your email will be down while you make the changes. I recommend opening a support chat with SS so they give you the edit, copy it, open a support chat with Google, explain what you need done, and paste the change that SS gave you. Google will walk you through every step, as they did with me. As soon as I hit save, they had me check if the domain was verifying on SS, and it was. Instantly, no down time, and email was up. It doesn't take the 48 hours you might see, so don't be scared of that.

Same is happening to me. Please help! My IG feed is on my homepage and I need this to be working.

I need this too! I contacted customer support and was told the following:
At this time it isn't possible to generate a payable invoice with our platform tools. However, as part of our efforts to continue to innovate and update our product, I will gladly pass this on to our Development team as a feature request. This is a popular feature request among merchants who use Squarespace. While we can't guarantee implementation, this is an important part of how we continue to improve our platform, so we appreciate your input.
eCommerce is changing, especially with Instagram Live sales. Being able to send customers a payable invoice would make life so much easier. I hope they release a solution soon!
 

I did the same as twobeatsahead two days ago, and can confirm it works.
I thought it was something in my Custom DNS section under the Google domain settings. I wiped all records out and only had the three required for domain verification...and nothing. It turned out it was the records under the Synthetic Records section. (Thank you Chris from SS support for pointing that out). 
Chris from Squarespace told me what record needed to be edited, and what it needed to be changed to. The issue is that a Google Workspace synthetic record can't be edited, it needs to be completely deleted (as mentioned above). Yes, it is scary, and your email will be down while you make the changes. I recommend opening a support chat with SS so they give you the edit, copy it, open a support chat with Google, explain what you need done, and paste the change that SS gave you. Google will walk you through every step, as they did with me. As soon as I hit save, they had me check if the domain was verifying on SS, and it was. Instantly, no down time, and email was up. It doesn't take the 48 hours you might see, so don't be scared of that.

I need this too! I contacted customer support and was told the following:
At this time it isn't possible to generate a payable invoice with our platform tools. However, as part of our efforts to continue to innovate and update our product, I will gladly pass this on to our Development team as a feature request. This is a popular feature request among merchants who use Squarespace. While we can't guarantee implementation, this is an important part of how we continue to improve our platform, so we appreciate your input.
eCommerce is changing, especially with Instagram Live sales. Being able to send customers a payable invoice would make life so much easier. I hope they release a solution soon!
 

Is it possible to create and send an invoice to a client? I used to use square before I switched to square space and it let me invoice clients.