[Forum] HTTP 500 Error - Error_log -> class_bootstrap on line 1705

[UfukKOCA]

My forum page sometimes gives http 500 error

public_html/error_log - > [07-Jan-2019 22:18:58 Etc/GMT-3] PHP Fatal error: Cannot access property vB_Bootstrap_Forum::$force_styleid in /home/u8153312/public_html/includes/class_bootstrap.php on line 1705

could you please help

[Wayne Luke]

What version of vBulletin 4 and PHP are you using?

[UfukKOCA]

What version of vBulletin 4 and PHP are you using?

Php = 5.6.36
Vbulletin 4.2.4
Linux