several problems with the config wizard :

1. if schema has not been inserted, db config step after testing shows :
"The frontend does not match Zabbix database."

this is misleading & wrong. maybe checking for basic tables (hosts, items, users) and showing an error message if any of them is missing ?
or maybe even better, check that all tables, present in the schema (which frontend has) are there; if not, suggest that schema.sql has not been inserted

2. if data.sql has not been inserted, db connection step shows "all ok" - instead, it should check db version already, and complain if it is missing or mismatches

3. after finishing the config wizard, instead of getting the login page, we end up in setup.php with an error message :

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the last one is a regression