Android Question alerter_alert_default_layout: Binary XML file line #49

[Samara]

i use this lib:

Alerter Library

DEPRECATED LIBRARY. Original Alerter library: https://github.com/Tapadoo/Alerter Original description: This library aims to overcome the limitations of Toasts and Snackbars, while reducing the complexity of your layouts. v0.80 - Initial release v0.90 - Show and Hide events v1.00 -...

www.b4x.com

i get this error:
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
*** mainpage: B4XPage_Created
*** mainpage: B4XPage_Appear
** Activity (main) Resume **
*** main_page: B4XPage_Created [mainpage]
*** login_page: B4XPage_Created [mainpage]
*** addcontacts_page: B4XPage_Created [mainpage]
*** mainpage: B4XPage_Disappear [mainpage]
*** main_page: B4XPage_Appear [mainpage]
*** main_page: B4XPage_Disappear [main_page]
*** addcontacts_page: B4XPage_Appear [main_page]
*** addcontacts_page: IME_HeightChanged [main_page, addcontacts_page]
android.view.InflateException: Binary XML file line #49 in gsm.naserinejad.sa.ir.apk:layout/alerter_alert_default_layout: Binary XML file line #49 in gsm.naserinejad.sa.ir.apk:layout/alerter_alert_default_layout: Error inflating class androidx.appcompat.widget.AppCompatTextView
Caused by: android.view.InflateException: Binary XML file line #49 in gsm.naserinejad.sa.ir.apk:layout/alerter_alert_default_layout: Error inflating class androidx.appcompat.widget.AppCompatTextView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:858)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1010)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1127)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1130)