Hello,
Some people are facing this problem,
but it’s very easy to fix.
Just uninstall the app from your device, then reinstall it again from the Google Play Store. The error will be fixed.
You will see

Link application

https://play.google.com/store/apps/details?id=gr.nikolasspyr.integritycheck

Play integrity✅✅✅


Keybox ✅✅✅

https://t.me/keybox_xml/639