As you may know, Google Store will only accept 64bits applications. So I had to start converting it. Which implied installing a new version of Unity and, as a consequence, new versions of AndroidSDK and AndroidNDK. So far I'm still facing a compatibility problem between Unity 2019.3.0b4 and AndroidNDK 19 though it is the version required by Unity.
I'm investigating it... Sorry for the inconvenience.
Here is still a pic of the work in progress :
