This is a discussion on vbseo.com bug within the Troubleshooting forums, part of the vBSEO SEO Plugin category; MaktoobForums...
try copy pasting the link in he browser gives this fatal error sometimes
Warning: require(/home/vbseo/domains/vbseo.com/public_html/maktoobforum.php) []: failed to open stream: No such file or directory in /home/vbseo/domains/vbseo.com/public_html/vbseo.php on line 1230
Fatal error: require() []: Failed opening required '/home/vbseo/domains/vbseo.com/public_html/maktoobforum.php' (include_path='.:/usr/local/lib/php') in /home/vbseo/domains/vbseo.com/public_html/vbseo.php on line 1230
The username was conflicting with one of CRRs we have defined, the issue has been corrected - thank you for reporting!
Oleg Ignatiuk / Crawlability Inc.
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Thanks fixed somes so figured out that was coming from missing "^" chars in front of some CRR wich was conflicting then with forum or thread names, "^" looks very important setting up crrs.
for example with a crr wrote
'search\.php$' => 'search/[NF]'
then with a forum name ending like "security research" for example, this produce fatal error, I must write the crr '^search\.php$' => 'search/[NF]' to workaround.