Hello @dailymay !
I’ve checked the snippet on my test site – after adding it and setting it up it worked correctly on the first attempt, without any issues.
The notice actually doesn’t seem to be related to this issue (I’m not getting it as well) and I think PHP will be able to handle that anyway (hence the “notice” level, which is the lowest one).
As I wasn’t able to replicate this, we may have to take a closer look here. Can you share a link to the form on the site and also share the exact code you’re using if it’s different than the snippet shared earlier (ie. if anything else was changed besides the form’s ID in one of the first lines).
We understand that you may not want to publicly share those kinds of details – if that’s the case, please feel free to send us an email through our contact form instead:
https://wpmudev.com/contact/#i-have-a-different-question
Please use the template below:
Subject: “Attn: Pawel”
Message template:
– Link to the page with the form
– Link to the code you're using
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Kind regards,
Pawel