Keyexpired - App not being deployed

Triyng to deploy my app but getting the msg:

**[2020-11-18T15:16:33.339974630+0000] Execute script: packages/build/units.sh

  • set -e
  • apt-get update -qq
    E: The method driver /usr/lib/apt/methods/https could not be found.
    W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease: The following signatures were invalid: KEYEXPIRED 1602869253 KEYEXPIRED 1602869253 KEYEXPIRED 1602869253
    ################################# End Task Log #################################
    Erro: Unhandled Exception: Child Task 826009274 failed: Error building image: Build exited with non-zero status: 100**

Prease, help.