Compatibility with PHP 7.0 error

Hi,

I want to upgrade my Siteground hosted WordPress to PHP7 but it’s fining an incompatibility with ‘Login with Ajax’.

Here is what Sitegrounds WordPress testing plugin is telling my:
FILE: /home/whichinv/public_html/wp-content/themes/valenti/plugins/login-with-ajax/login-with-ajax-widget.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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6 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.

Any suggestions for what can be done to fix this please?