Site crash when running smush bulk pro

Site crach.
I wa chatting sor help yesterday and got this recommendation from you tech guy:
https://thimpress.com/knowledge-base/how-to-increase-maximum-execution-time-for-wordpress-site/
-
I tried that but it caused a site crash when I used othe plugin called "One Signal" (Push notifications)
So I removed the correction.
-
Your help will be appreciated.
I can;t use the smush bulk...
-
Thanks,
Yaron Carmi