Uncaught ReferenceError: ajax is not defined

Hi All,

Using PHPRunner 10.2, I copied the Email page as PDF example:
https://xlinesoft.com/phprunner/docs/how_to_email_the_current_page_as_pdf.htm

It doesn't say explicitly in the example, but I put this into a button on the page I want to send.

Nothing happens when I click the button, in the console in Chrome I get the following error:

button_Email.js?33576:2 Uncaught ReferenceError: ajax is not defined
at Object.pageObj.buttonEventBefore.Email (button_Email.js?33576:2:254)
at constructor.clickHandler (RunnerAll.js?33576:369:63)
at HTMLAnchorElement.callHandler (RunnerAll.js?33576:283:54)
at HTMLAnchorElement.dispatch (loadfirst.js?33576:1:40407)
at HTMLAnchorElement.r.handle (loadfirst.js?33576:1:37108)
pageObj.buttonEventBefore.Email @ button_Email.js?33576:2
clickHandler @ RunnerAll.js?33576:369
callHandler @ RunnerAll.js?33576:283
dispatch @ loadfirst.js?33576:1
r.handle @ loadfirst.js?33576:1

Any ideas?? Thanks.