There is a problem with Fans Confirmation when Permalinks disabled for modules such as Groups. See solution below for this problem.
In inc/classes/BxDolTwigPageView.php :
In the function _blockFansUnconfirmed :
Find :
$sActionsUrl = BX_DOL_URL_ROOT . $this->_oMain->_oConfig->getBaseUri() . "view/" . $this->aDataEntry[$this->_oDb->_sFieldUri] . '?ajax_action=';
Replace with :
$sActionsUrl = bx_append_url_params(BX_DOL_URL_ROOT . $this->_oConfig->getBaseUri() . "view/" . $this->aDataEntry[$this->_oDb->_sFieldUri], 'ajax_action=');