Custom Luma theme magento 2 missing Customer sign in

[nht48823]

I have "create account" but I am missing "Sign in" here is my custom default XML - I am getting system error report, "main.CRITICAL: Broken reference: No element found with ID 'customer. not sure its related. any help is appreciated - Thanks 

<referenceBlock name="footer_links" remove="true" />
<referenceContainer name="header.panel">
    <block class="Magento\Framework\View\Element\Html\Links" name="header.links">
        <arguments>
            <argument name="css_class" xsi:type="string">header links</argument>
        </arguments>
    </block>
</referenceContainer>
<referenceBlock name="logo">
    <arguments>
        <argument name="logo_img_width" xsi:type="number">148</argument>
        <argument name="logo_img_height" xsi:type="number">43</argument>
    </arguments>
</referenceBlock>
<referenceContainer name="footer">
    <block class="Magento\Store\Block\Switcher" name="store_switcher" as="store_switcher" after="footer_links" template="switch/stores.phtml"/>
</referenceContainer>
<referenceBlock name="report.bugs" remove="true"/>
<move element="copyright" destination="before.body.end"/>

[Meetanshi]

Hello  @nht48823 

Create vendor/magento/theme-frontend-luma/Magento_Customer/layout/default.xml

 <referenceBlock name="header.links">
            <block class="Magento\Customer\Block\Account\Customer" name="customer" template="Magento_Customer::account/customer.phtml" before="-"/>
            <block class="Magento\Customer\Block\Account\AuthorizationLink" name="authorization-link-login" template="Magento_Customer::account/link/authorization.phtml">
                <arguments>
                    <argument name="sortOrder" xsi:type="number">10</argument>
                </arguments>
            </block>
        </referenceBlock>

The above code will be helpful to add the sign-in link in the file in Magento 2.

Hope it helps.