Error Log messages Failed to open stream

If I look into the error log of my website, I see a lot of error messages related to autoptimize. I searched for this error but couldn’t find any solution.

[Thu Feb 08 13:43:29.829380 2018] [:error] [pid 47271:tid 140513692800768] [client 95.211.216.137:36608] PHP Warning:  file_put_contents(/home/laserg/public_html/lazertag/wp-content/cache/autoptimize/css/autoptimize_f60e0de3e3e8068964e4c937db42afdc.css): failed to open stream: No such file or directory in /home/laserg/public_html/lazertag/wp-content/plugins/autoptimize/classes/autoptimizeCache.php on line 59, referer: https://www.lazertag.be/?ao_speedup_cachebuster=44594
[Thu Feb 08 13:43:29.819616 2018] [:error] [pid 48072:tid 140514084321024] [client 84.198.241.2:49985] PHP Warning:  file_put_contents(/home/laserg/public_html/lazertag/wp-content/cache/autoptimize/css/autoptimize_b7857a2a0efae0433a716ab2d6b1b6d1.css): failed to open stream: No such file or directory in /home/laserg/public_html/lazertag/wp-content/plugins/autoptimize/classes/autoptimizeCache.php on line 59, referer: https://www.bing.com/
[Thu Feb 08 13:43:29.799902 2018] [:error] [pid 47271:tid 140513692800768] [client 95.211.216.137:36608] PHP Warning:  file_put_contents(/home/laserg/public_html/lazertag/wp-content/cache/autoptimize/autoptimize_0ca8d9f97b67fa3259c0e832e1b37baf.img): failed to open stream: No such file or directory in /home/laserg/public_html/lazertag/wp-content/plugins/autoptimize/classes/autoptimizeCache.php on line 59, referer: https://www.lazertag.be/?ao_speedup_cachebuster=44594

[Moderator note: Giant log snipped. Please use pastebin.com or gist.github.com for large pastes and put a link in your message.]

• This topic was modified 7 years, 1 month ago by Steven Stern (sterndata).

The page I need help with: [log in to see the link]