Chrono Forms 7 next page not working

I have a large form which I am moving from v5 to v7.
First I had to recreate the page buttons.
This has worked for all pages up to page 6. I have created the button exactly the same as the rest but it won't continue onto page 7
mod security rule has been whitelisted.
any help will be appriciated

Hi
​
Very important information for this kind of problem: Joomla 3 or Joomla 4?

I am using Joomla 3 and php 7.4.29

OK
​
Are you using sequential form of standalone form?
Can you send me your form (with only button on each page...)?
​
Thanks

Hi there,
Thanks for you reply.
I am using sequential form.
​

This is private content

I Can't download your form...
​
"The content here is visible only for authorized users."

Hi there, sorry about that.

This is private content

... The same...
This is a private message