I don't see any program that is using the microphone and I checked the Microphone permission and it's only the boldbeast that has permissions to use I don't know what to do anymore !!!!!!
In this case please use Record Mode 1 to record calls.
If it still can't save the recording, you 100% installed another recorder that blocked Boldbeast working. You must uninstall that recorder.
If it saves the recording, this indicates Samsung enabled Boldbeast to use Record Mode 1 but disabled it to use Record Mode 12. If the recording is good, that's OK. If the recording is silent or the caller's voice is weak, you should root the phone to fix it.