During installation, Reflection Exception error

This article provides a solution for the Reflection Exception error during installation.

Details

During the installation, a message similar to the following displays:

[ERROR] exception 'ReflectionException' with message 'Class Magento\Framework\StoreManagerInterface does not exist' in /<path>/lib/internal/Magento/Framework/Code/Reader/ClassReader.php

Solution

Clear all directories and files under Adobe Commerce's var subdirectory and install the Adobe Commerce software again.

As the Adobe Commerce file system owner or as a user with root privileges, enter the following commands:

$ cd <your Magento install directory>/var

$ rm -rf var/cache/* di/* generation/* page_cache/*

Redis

If you use Redis and still get an error, clear the Redis cache as follows:

$ redis-cli FLUSHALL