2 fplanque Aug 14, 2017 00:46

Hi @amoun,
It looks more like the 'User::set_Group()' function received an empty or null $Group parameter value. Could you verify if the default groups are available?
@winskie if the default groups are not available, please gracefully display a message like "Cannot create demo user "xyz" because User Group #w was not found." and consequently gracefully handle demo contents creation (maybe it means all demo contents will be have current user as creator)
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We'll check that asap.