ob_end_flush

[08-Jul-2020 22:17:52 UTC] PHP Notice:  ob_end_flush(): failed to send buffer of zlib output compression (0) in /home/???/public_html/wp-includes/functions.php on line 4609
[08-Jul-2020 22:17:52 UTC] PHP Notice:  ob_end_flush(): failed to send buffer of zlib output compression (0) in /home/???/public_html/wp-content/plugins/gallery-custom-links/mgcl_core.php on line 189

I have noticed this before in my debug.log files on the sites where I use your plugin, but ignored as it didn’t seem to be an issue. Today, on one site, I was attempting to do a basic update to a page that didn’t even display a gallery. I noticed upon trying to save the page that it stalled out and I got 500 internal server error. I looked for the debug.log file and it had reached over 1GB. It was the first line above once, then the second line repeated.

I removed your plugin from my plugins folder and the error continued even after that. My site was unreachable for 20-30 minutes until something was reset. I tried to reactivate the plugin afterward and the same thing happened again.

Let me know if you need more info…