TOPIC:

Completely remove the jni libraries.
It seems that you're mixing different versions.

May you confirm the RadaeePDF SDK version you're upgrading from?
 

We updated RadaeePDF SDK from 3.15.1 to 3.55.5

What does it mean "java codes of package "com.radaee.pdf" shall update to 3.60, otherwise app will be crashed"?.

How we can achieve this?.

Any information is appreciated.
Thank you.

some JNI methods has changed from old version. parameters may not same as before in C++ public function.
that not always crashed in some device, seems depends on system.
java codes of package "com.radaee.pdf" all are native JNI wrapping.
so, codes of this package shall match the last native, which i attached this topic.