The same error can happen if you use DNFS ( direct NFS ) , and somehow... you modify the IP the storage or server.
Until you don't modify oranfstab, you can not mount/open the database, and the same misleading error you have is ORA-00600: internal error code, arguments: , , , , , , , , , , , 
Applies to:Oracle Server - Enterprise Edition - Version: 18.104.22.168
Information in this document applies to any platform.
This can be downloaded with Patch:11668495