Probably, your third-party library uses native code, compiled for a processor with the architecture of arm64-v8a. Please check this and let as know what aar are you also including?
Free version of RTR SDK is supplied with the code compiled under armeabi-v7a (and this is mentioned in the specification). So it is not compatible at the binary level with arm64-v8a.
In case the libraries you are using come with binary files compiled both under armeabi-v7a and arm64-v8a, you may try to apply the following setting in build.gradle file:
In case third-party library has only arm64-v8a compatible binaries, then you can use the extended version of RTR SDK, it supports arm64-v8a. For getting more information about extended version please contact our sales via form from our site.