Marking all resources as changed. Re-publish all files
Deleting and re-doing teh form, since and repeat.
Nothing seems to do it “webhook” file is never published.
While on the subject of webhooks. I had to create an html component to add hidden fields with values to the form for my subscribe, as there does not appear to be a way currently to add hidden fields with values?
But further investigation revealed the issue was PHP version. Having updated my PHP version its working. No idea why Safari pointed me at teh error being here, which does not exist.