Error when creating an account after subscribed to newsletter

[HNB]

This error shows up when I first successfully subscribed to the newsletter

and then later create an account for this email.

And the status of this email is showing "Account invite sent" for this account, and it took me about 8mins to receive that email.

But the most important thing is the error message shown below. It happens every time for a customer who subscribed to the newsletter first and creates an account later.

How to fix it?

Here's my store link: https://hasnobounds.com

[Finknz]

Did you ever get a solution? I am having similar issues, thanks