This occurs because the setting validation checks the new prefix value against existing prefixes, but during installation, this step occurs before the step where the key 'Prefix' is defined. This results in undefined offset errors and a failed existence check due to the missing keys. We can bypass this during installation with the following change:
In library/vw/XenForo/Option/Prefix.php, find:
Code:
if (!$value OR vw_Hard_Core::controller('Fetch')->get('Prefix', $value))
Replace with:
Code:
if (!$value OR defined('VW_INSTALL') OR vw_Hard_Core::controller('Fetch')->get('Prefix', $value))
I got that error too and fixed it as instructed.
However now I get tis:
Installing VaultWiki v4.0.0 Gamma 1
Code:
Step 8
creating_wiki_index
Fatal error: Call to undefined method vw_XenForo_BbCode_Parser::removeTag() in /var/www/vhosts/weber.clients.rendrag.net.au/vb_canriders/forum/vault/core/model/parser/sideways/link/xf.php on line 47
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