Error inflating class android.support.constraint.ConstraintLayout after updating the package to androidx - Programmer Sought
Error inflating class androidx.appcompat.widget.ActionBarOverlayLayout · Issue #3 · takahirom/DownloadableCalligraphy · GitHub
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ClassNotFoundException androidx.constraintlayout.widget.helper.Flow (Drop-in SDK 3.3.0) · Issue #109 · Adyen/adyen-android · GitHub
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Error inflating class android.support.constraint.ConstraintLayout and Error inflating class android.sup - Programmer Sought
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How to fix Missing classes error in Android Studio | Missing constraints in constraint layout - YouTube
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