dop2000 A lot of only supported Facebook SDK versions were depreciated, including that one, 4.40.4. I can't tell which is which anymore, but when I get back, I could look it up again, but it won't matter since they are long depreciated and removed.
A few confusion happened, but it became clearer that it's a Facebook SDK version conflict with the c3Runtime, somehow there is something being overwritten when the Facebook SDK is joined with the c3runtime.
Now I remember, it was on the first week of May that we lost the last Facebook SDK version compatible with the c3runtime, all got depreciated and removed. Hence, the build error you get with the Facebook SDK version : 4.40.4. At that time, there were no supported versions available which were compatible with the c3runtime.
Since new SDKs were released since then, maybe you can check the new versions after the 1st week of May and see if they work.
SDK Versions
github.com/facebook/facebook-android-sdk/releases
Stable counterpart
facebook.com/unsupportedbrowser
Good luck.
I will make sure to resolve this after I get back too.