Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Apple Set To Acquire Italien Audio Software Creator Redmatica –
Reports are suggesting that Apple has just purchased Italian startup Redmatica, The company develops software which enhances popular audio sampler software The report has come after these documents from local regulator AGCOM.
There has been no confirmation from Apple as of yet but this would seriously improve Login pro and also garage band
Apple will most likely be interested in the new Escher, Penrose and Moebius Machines as well as the GBSamplerManager which Redmatica designed to help managing instruments in garageband