[Plugin: Broken Link Checker] Error encountered after the "nuclear option"

After installing on a Windows server running php 5.2.9.9, got this error:

Warning: Cannot modify header information – headers already sent by (output started at C:\…\docs\wp-includes\script-loader.php:693) in C:\…\docs\wp-includes\pluggable.php on line 934

Thanks!

https://www.ads-software.com/extend/plugins/broken-link-checker/