Hi @astrava,
v9.18 will not work with MySQL 5.6, I’m afraid.
If you want to use 5.6, you’ll need to upgrade to a higher version.
MySQL 5.6 support was added in 11.1.0. The DB population will not work correctly when strict mode is enabled so, to work with 5.6, one needs to disable it. There were several other changes that had to be done, both to the SQL code under deployment/base/sql and the installation scripts.