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Class 'ReCaptcha' not found in {trimmed}/w/extensions/ConfirmEdit/ConfirmEditHooks.php

{trimmed} is full path I removed from log

this is my config

$wgCaptchaClass = 'ReCaptcha';
$wgReCaptchaPublicKey = '**';
$wgReCaptchaPrivateKey = '**';
$wgGroupPermissions['emailconfirmed']['skipcaptcha'] = true;
$ceAllowConfirmedEmail = true;
$wgGroupPermissions['autoconfirmed']['skipcaptcha'] = true;