Folder wp-include not added to achive

Hi,
I use this plugin since a long time.
But since yesterday, i have a problem, wp-include folder is not added in the backup archive and when i try to decompress the archive, i have an error “unexepected error”, but i can see into the folder.
I tried to change the compression mode, but same issue.

I compared the logs and seen no error.

The folder have good permissions.

Can you help me ?
Sorry for my english… and thanks

https://ww.wp.xz.cn/plugins/backwpup/