Do WordPress plugins suport multisite site?

All properly written plugins work on multisite too. You should still test each plugin separately and in combination with others on a development installation.

Keep in mind, the wordpress.org plugin repository is just hosting many plugins; there is no quality control – read the code before you install anything. Use the plugin Log Deprecated Notices and check each plugin for these notices. They are usually (but not necessary) a indicator for wrong code.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)