I keep getting this:

Find command files for phase 3 (max=)
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Undefined index: db_prefix install_8.inc:105
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Undefined variable: config install_8.inc:112
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Undefined variable: config install_8.inc:113

On this install like https://www.drupal.org/project/brainstorm_profile where all files are in one directory I get the above errors and sites cannot be installed.

When I use composer and the install is in a subdirectory it seems to work fine.
This is an example where the install is placed in a 'html' directory when composer is used:
https://www.drupal.org/project/social

Workaround:
I had to move all profile modules, themes, libraries to the regular library, theme, and module folder.

Comments

SocialNicheGuru created an issue.