Errors when installing EDY from github

[zhangnan0107]

Dear all,

Thanks for developing the EDY tool! I got an error when trying to install the R package from github. Could you please provide some suggestions regarding this?

install_github("isglobal-brge/EDY")

Errors

Error: package or namespace load failed for ‘clock’:
 .onLoad failed in loadNamespace() for 'clock', details:
  call: as_zoned_time(as_sys_time(duration_seconds()), "UTC")
  error: `zone` must be a valid time zone name.
ℹ "UTC" is invalid.
ℹ Allowed time zone names are listed in `clock::tzdb_names()`.
Error: loading failed
Execution halted
ERROR: loading failed

Thanks.