Ajax: If I don't solve this issue, I'll lose my job

Design help Custom code
1

I solved my issue.

Long Live SendInBlue.

Please Archive.

2

Without knowing what ajaxSubmit.php does, I am unable to advise.

Also, there is an error in your code, so the whole file will fail to work.

Screenshot_2017-11-20_091146

Also, feel free to contact me for further code help and/or customization of third-party plugins