iTunes Library.itl does not appear to be a valid iTunes library file - High Sierra
Since a few days I get the following message when opening itunes (version 12.8.3.1 on High Sierra MBP mid 2014).
The file "iTunes Library.itl" does not appear to be a valid iTunes library file. iTunes has created a new iTunes library and renamed this file to "iTunes Library (Damaged)".
When I restore the Itunes folder from time machine it works once and I can see my library but when I close it down and re-open itunes I get the same message again.
Any ideas for solutions?
Thank you.