Thank you for helping:
1.
B4A Version: 9.50
Java Version: 8
Parsing code. (0.15s)
Building folders structure. (0.05s)
Compiling code. (0.45s)
Compiling layouts code. (0.02s)
Organizing libraries. (0.00s)
(AndroidX SDK)
Generating R file. (1.49s)
Compiling generated Java code. Error
B4A line: 169
panelAct.AddView(MassagesCardView,4%x,2%y,92%x,33
javac 1.8.0_221
src\com\app\gsm\controler\home.java:611: error: cannot access CardView
mostCurrent._panelact.AddView((android.view.View)(mostCurrent._massagescardview.getObject()),anywheresoftware.b4a.keywords.Common.PerXToCurrent((float) (4),mostCurrent.activityBA),anywheresoftware.b4a.keywords.Common.PerYToCurrent((float) (2),mostCurrent.activityBA),anywheresoftware.b4a.keywords.Common.PerXToCurrent((float) (92),mostCurrent.activityBA),anywheresoftware.b4a.keywords.Common.PerYToCurrent((float) (33),mostCurrent.activityBA));
^
class file for android.support.v7.widget.CardView not found
2. Already I add all required libraries for B4A,
About Android I have standard one SDK and do not installed extra,
Please recommend if i need to add more