Error when installing timeline

Hello,

I had uninstalled the timeline on my site, and today I decided to reinstall, but an error message appeared.

The module is installed because I have done a text post, but I wonder why the error.

I would appreciate a help, please.

Thanks

It appears that it is missing the unit; however, I can not tell you why.

And if I overwrite files wall module, it can solve the problem?

Thanks for your help

Only if the files are corrupted, which they probably are not.

Doctorbux let me  check it send me access via pm..

 Thank you