Variable 'innodb_buffer_pool_chunk_size' is a read only variable

The error message "Variable 'innodb_buffer_pool_chunk_size' is a read only variable" means that you are trying to change the value of a MySQL system variable that is read-only. The variable 'innodb_buffer_pool_chunk_size' is used to set the size of InnoDB buffer pool chunks, which cannot be changed dynamically once InnoDB has started using them.

To resolve this issue, you can try setting the value of the variable in your MySQL configuration file (my.cnf or my.ini) before starting the MySQL server. Alternatively, you can try using a different variable to adjust the InnoDB buffer pool size, such as 'innodb_buffer_pool_size'. Make sure to consult the MySQL documentation and consider the potential impact of changing these variables on your system's performance and stability before making any modifications.