Store setting cannot be saved after migration.

System -> setting -> edit.
After I changed any of the store info such as store name, contact no. or address, then click save.
The opencart pops up this error page.


This error happens when I transfer this opencart from one server to another server.
How to solve this problem.
Please help.

More info please. What's in your config.php files, htaccess file, did you have SSL before, is the current PHP version different? The more we know the more we can help.