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XF 1.5 Installation ERROR

Hello guys

I have a problem at the installation

The error is [ callback_class_x_for_option_y_is_not_valid ]

Can you help me ?

best regards


XenForo developer
Staff member
Is this an error installing XenForo? If so, that would appear to indicate that the files haven't been uploaded correctly. Please try reuploading them and restarting the installation.