According to Ethiopian Airlines, Ethiopian Authorities have suspended issuance of visa on arrival and e-visa provision for all passengers starting from the midnight of 18 June 2021 until further notice.
Please contact the Ethiopian Embassy or Consulate nearest to you for visa-related inquiries before traveling.
Temporary Visa Regulation for Ethiopia (Ethiopian Airlines)
https://www.ethiopianairlines.com/aa/en/temporary-visa-regulation-for-ethiopia
【Ethiopia】Ethiopia temporary ban on visa on arrival and e-visa