Here's a more complete error message: Mar 30 17:35:14 ubuntu ubiquity: Error in function update Mar 30 17:35:14 ubuntu ubiquity: message repeated 2 times: [ Error in function update] Mar 30 17:35:16 ubuntu systemd-resolved[1159]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Mar 30 17:35:23 ubuntu ubiquity: E: Mar 30 17:35:23 ubuntu ubiquity: The repository 'cdrom://Ubuntu 18.04.2 LTS _Bionic Beaver_ - Release amd64 (20190210) �/dists/bionic/main/binary-amd64/ Release' does not have a Release file. Mar 30 17:35:23 ubuntu ubiquity: E: The repository 'cdrom://Ubuntu 18.04.2 LTS _Bionic Beaver_ - Release amd64 (20190210) �/dists/bionic/restricted/binary-amd64/ Release' does not have a Release file. Mar 30 17:37:31 ubuntu /install.py: Terminated ubiquity update process. Mar 30 17:37:31 ubuntu ubiquity: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa0 in position 70: invalid start byte
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