Parse Error: Syntax error

if you can, do a troubleshooting test of each updated plugin.

then find out which one is causing the problem, and roll back to previous version.

contact the plugin author to let them know.

The clue is in the message

ml-slider

which is Slider, Gallery, and Carousel by MetaSlider – Responsive WordPress Plugin https://en-gb.www.ads-software.com/plugins/ml-slider/#description

and /admin/lib/extendify-notice.php

if you look at the change log 6th Jan https://en-gb.www.ads-software.com/plugins/ml-slider/#developers

Some changes were made to extendify

If you are on the latest release then contact the plugin support here
https://www.ads-software.com/support/plugin/ml-slider/

We’ll have this fixed in the next MetaSlider release. Thanks for reporting it @victor1708

Of note though, this error indicates you’re on an outdated version of PHP that is no longer recommended by WordPress (they recommend at least 5.6.20 and you’re on < 5.4). You should contact your host to see if it is possible to upgrade.