Why might my private apps stop working after April 1, 2021?

[hbmenwardrobe]

A developer needs to update your private apps before April 1, 2021
Some of your private apps may stop working as expected because they are calling unsupported APIs. Contact your developer to ensure these apps continue working. If you can't contact the original developer, you can hire a Shopify expert.

This message is based on data from the last 14 days and may not reflect recently fixed apps.

Private apps that need updates before April 1, 2021: MageNative Storefront App

Please help??

[zarma]

You need to contact the app developer support. This may be the best way to reach them. Did you email them for support?