MyBB Community Forums

I am getting this error when installing MyBB.

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1045 - Access denied for user 'forumsbb_forums'@'localhost' (using password: YES)
Query:
[READ] Unable to connect to MySQL server
Please contact the MyBB Group for support.

This error shows after when adding themes settings etc.

Connection to the database server and database you specified was successful.

Database Engine: MySQLi 5.5.33

The MyBB database tables will now be created.

Creating table mybb_adminlog...done
Creating table mybb_adminoptions...done
Creating table mybb_adminsessions...done
Creating table mybb_adminviews...done
Creating table mybb_announcements...done
Creating table mybb_attachments...done
Creating table mybb_attachtypes...done
Creating table mybb_awaitingactivation...done
Creating table mybb_badwords...done
Creating table mybb_banfilters...done
Creating table mybb_banned...done
Creating table mybb_calendars...done

After that it shows the MySQL error.
Can anyone help please?

The error for your first code because of your database login details are incorrect.