在我改变了我的prestashop安装域名后，我不能再连接到admin了。我尝试调试mod，然后我可以连接到admin，但在我的产品页中出现错误：

(1/1) ContextErrorException
Notice: Undefined index: lng

in e50d7a72e070bd5681c93bfa420e5d7bf7ce90e8_2.file.product.tpl.php line 635
at Block_5636438495bf032887165a3_21987681->callBlock(object(SmartyDevTemplate))
in smarty_internal_runtime_inheritance.php line 247
at Smarty_Internal_Runtime_Inheritance->callBlock(object(Block_5636438495bf032887165a3_21987681), object(SmartyDevTemplate))
in smarty_internal_runtime_inheritance.php line 183
at Smarty_Internal_Runtime_Inheritance->process(object(SmartyDevTemplate), object(Block_5636438495bf032887165a3_21987681), object(Block_15679221315bf0326619f255_83923016))
in smarty_internal_runtime_inheritance.php line 185
at Smarty_Internal_Runtime_Inheritance->process(object(SmartyDevTemplate), object(Block_15679221315bf0326619f255_83923016))
in smarty_internal_runtime_inheritance.php line 157

有人能帮忙解决这个问题吗？