Hi Tin(??),
For your graph problem, you probably need to copy lib folder with all its content an other time!
For problem with file wt_data_intl.php file, the problem is that file have not been processed by Cumulus.
Since this file contain format=."hh`h`nn..... it "mix" php. Then, if you don`t use that file, simply delete it!
(or process it at least one time to avoid these "false" error!)
Hope this help!
Regards,
Jacques