Since this is not a Windows system file, its location depends on your MySQL installation. Typical paths include:
The solution here is to delete the DLL but to either update the client library or change the user’s authentication plugin on the server. caching-sha2-password.dll
caching-sha2-password.dll is a plugin file used by MySQL Server on Windows operating systems. Its primary function is to implement the caching_sha2_password authentication plugin. Since this is not a Windows system file,
method in MySQL. This plugin has been the default authentication mechanism since MySQL 8.0, replacing the older mysql_native_password MySQL :: Developer Zone Key Technical Aspects caching-sha2-password.dll
If you are stuck with an ancient client that cannot be updated, you can change a specific user account back to mysql_native_password :