[BUG] Android app crash on launch

Android build crashes as soon as it launches if the plugin is installed. The crash happens before any C# script runs.
This is not a solution but just to check, if I disable "Load On Start Up", the app launches then crashes when it tries to initialize the library.
IL2CPP and arm64 are selected, I have also tried various android API versions but no luck. Are there anything else to check? What related software versions do I need to use for this lib? Any info appreciated.

Reproducible step on my system is quite easy as follows;

1. create a new empty 3d unity2020.3 project (currently trying on 2020.3.0f1)
2. set the build target to android, select IL2CPP and arm64
   --> try to build and run at this point. It works.
3. import webrtc 2.4.0.exp3 (no need to write any code.).
   --> now build and run again, then you get the error.

The log looks like this;

06-13 15:48:12.153: E/CRASH(17882): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-13 15:48:12.153: E/CRASH(17882): Version '2020.3.0f1 (c7b5465681fb)', Build type 'Release', Scripting Backend 'il2cpp', CPU 'arm64-v8a'
06-13 15:48:12.153: E/CRASH(17882): Build fingerprint: 'google/flame/flame:11/RQ1A.210205.004/7038034:user/release-keys'
06-13 15:48:12.153: E/CRASH(17882): Revision: 'MP1.0'
06-13 15:48:12.153: E/CRASH(17882): ABI: 'arm64'
06-13 15:48:12.153: E/CRASH(17882): Timestamp: 2021-06-13 15:48:12+0900
06-13 15:48:12.153: E/CRASH(17882): pid: 17882, tid: 17904, name: UnityMain >>> com.DefaultCompany.IL2CPPTEST <<<
06-13 15:48:12.153: E/CRASH(17882): uid: 10321
06-13 15:48:12.153: E/CRASH(17882): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
06-13 15:48:12.153: E/CRASH(17882): Cause: null pointer dereference
06-13 15:48:12.153: E/CRASH(17882): x0 0000007afe64da90 x1 0000007a87015dbc x2 0000000000000013 x3 737968507465476b
06-13 15:48:12.153: E/CRASH(17882): x4 0000007a87015b76 x5 0000007a859e9e8c x6 7665447465476b76 x7 41636f7250656369
06-13 15:48:12.153: E/CRASH(17882): x8 0000007afe64da90 x9 0000000000000000 x10 0000000000000000 x11 0000000000000000
06-13 15:48:12.153: E/CRASH(17882): x12 6563697665447465 x13 72646441636f7250 x14 0000000000000107 x15 0000000000000012
06-13 15:48:12.153: E/CRASH(17882): x16 00000079a7f73208 x17 0000007d7e9e02c0 x18 00000000ac3b7fa9 x19 0000007a01083f78
06-13 15:48:12.153: E/CRASH(17882): x20 0000007a872efd78 x21 0000007afe64da90 x22 0000007afe64d990 x23 0000007bae6a8110
06-13 15:48:12.153: E/CRASH(17882): x24 0000007a01083f60 x25 0000007a01083f78 x26 0000000000000000 x27 0000000000000000
06-13 15:48:12.153: E/CRASH(17882): x28 0000000000000000 x29 0000007a00c43d80
06-13 15:48:12.153: E/CRASH(17882): sp 0000007a859e9ec0 lr 0000007a86c0365c pc 0000000000000000
06-13 15:48:12.238: E/CRASH(17882): Tombstone written to: /storage/emulated/0/Android/data/com.DefaultCompany.IL2CPPTEST/files/tombstone_00