Save header issues, etc were caused by corrupted NAND that was used to create emu. After using my own clean NAND backup, Lockpick now works without issues. Thanks!
Now I got 212 keys for SysNAND and 213 keys for emuNAND. However, I get error during Titlekeys: "Save header is invalid" two times and "Failed to process es save" once. Unfortunately I don't get titlekeys