This is reported by Qatar News Agency.

HH Amir received a letter from the King of Saudi Arabia, that’s invites you to go to the 39th session of the Supreme Council on the 9th. Pic.twitter.com/W4ZzloSX3G

- Qatar News Agency (@QNAEnglish) December 4, 2018

It does not specify whether the emir accepted the invitation of the Saudi king.

On June 5, 2017, accusing Doha of supporting terrorism, eight countries broke off diplomatic relations with Qatar - Saudi Arabia, Bahrain, the United Arab Emirates, Egypt, Yemen, Libya, Maldives and the Republic of Mauritius.

The reason for the charges was the statement of the head of Qatar on the importance of maintaining ties with Iran and Israel.