I can't promise that this is your problem but it looks like trouble:
May 16 05:04:15 ubuntu ubiquity: /dev/sda5: Inodes that were part of a
corrupted orphan linked list found.
May 16 05:04:15 ubuntu ubiquity:
May 16 05:04:15 ubuntu ubiquity: /dev/sda5: UNEXPECTED INCONSISTENCY; RUN fsck
Thank you for taking the time to report this bug and helping to make
Ubuntu better.
Please note that Ubuntu 18.04 (bionic) reached end-of-standard-support
on May 31, 2023. You should only install supported releases of Ubuntu.
See this document for currently supported Ubuntu releases:
** Package changed: ubuntu => ubiquity (Ubuntu)
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https://bugs.launchpad.net/bugs/2065845
Title:
installation crash
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** Information type changed from Private Security to Public
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https://bugs.launchpad.net/bugs/2065845
Title:
installation crash
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