1. Please go to your FTP/Cpanel, and go to folder "wp-content/plugins"
2. Create a new file and name it with "bp-custom.php". If you already have the file, please just open it. No need to create a new file.
3. put this snippet into the file and save
https://kainelabs.ticksy.com/article/16432/
4. Clear your plugin cache (if you install it) and your browser. And please test to post a URL again.