Hi nabank ,
Thanks for the info!
Unfortunately, Buttonizer no longer supports PHP version 5.
Since the release of Buttonizer 2.1, we have optimized Buttonizer using PHP 7 features.
We recommend that you upgrade to PHP 7 as it is much faster than PHP 5.
WordPress Performance On Different Versions of PHP
PHP 5 is also no longer supported and might be exposed to unpatched security vurnabilities.
PHP: Supported Versions:
You will have to ask your hosting provider to upgrade your PHP version.
Here are instructions on how to upgrade:
Get a faster, more secure website: update your PHP today
If you have any questions, please let us know! 😃