Android Question Error java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/core/content/ContextCompat;

[zavaree]

Hi all
i update my b4a and when i try run my app show this error. (attached)
i update my sdk (attach 2).

please help me.
thx

 

[Erel]

Follow the installation instructions: https://www.b4x.com/b4a.html

 

[zavaree]

Follow the installation instructions: https://www.b4x.com/b4a.html

thx dear erel
i restore my b4a to 9.5 version. but when i try run my app attached error showing up.

 

[Erel]

1. Please post errors as text, not screenshots.
2. Use the latest version of B4A. Don't waste your time with old versions.
3. Don't set the additional libraries folder to be insider Program Files.
4. What is library.jar? This is something that you have created.

 

[zavaree]

Will there be a change if I open the program with version 10?
That does not work with version 9.5 and gives an error

i dont have any library.jar in my app !!

 

[Erel]

The current latest version is 10.2.
Following the installation instructions will solve the error in the first post.