Uncaught (in promise) TypeError: Cannot read property ‘length’ of undefined

Hi, I’m getting the following error after upgrading to WP-REST API version 0.10

index.js:372 Uncaught (in promise) TypeError: Cannot read property ‘length’ of undefined

Here’s what’s going on around line 372:

classes.mainNavSecondaryLinks
            )}>
              {menuData?.secondary_links.length > 0 &&       <====== LINE 372 
                <ul>
                    {menuData.secondary_links.map((item, i) => {
                      if (!item.link) return (<></>);