"Winning Over the Wyrm" MSQ Incompletable

[Senevir]

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Date & Time: 31/03/2019 approx 4:04 GMT (When the crash on Omega happened)
Frequency: Unknown (twice so far)
World name: Omega
Character name: Myrrh'a Afhkaar
Retainer name: None
NPC name: None
Monster name: None
Class/Level: Red Mage Level 60-61
Party or solo: Unsure (leaving instanced duty)
In-game time: Unknown
Area and coordinates: Unknown (leaving instanced duty)
Housing: None
Steps:
1. On the quest "Winning Over the Wyrm", I was within the duty "Sohr Khai".
2. Having just completed the duty (I received items and commendations, so I assume that I have broken from party) I exit the instance and begin to enter the next cutscene.
3. Before the cutscene has a proper chance to load, the crash on Omega happens.
4. When I log back into the game once the crash is repaired, the mission "Use Duty Finder to enter Sohr Khai" remains unchecked in my quest log. However, Sohr Khai has the green tick within my list of available duties.
5. I try again a few hours later. I successfully complete Sohr Khai. No cutscene this time, as as far as the system is aware, I have viewed it already.
6. Looking at my quest log, "Use Duty Finder to enter Sohr Khai" is STILL unchecked. I realise that the mission is glitched or bugged.
7. I think to abandon the quest and re-acquire it, but MSQs cannot be abandoned. I am stuck on this MSQ.




Connection Specs
- Type of internet connection/provider: DSL / Exetel
- Modem maker/model number: D-Link Viper DSL-2900AL

■ PC Specs

(This is not a graphics issue)


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Laptop Model Name: OMEN by HP Laptop
Laptop Model Number:

Gamepad Manufacturer: n/a
Gamepad Model Name: n/a
Gamepad Part Number: n/a

Browser Information
- Name and version of the browser currently in-use: Chrome Version 73.0.3683.86 (Official Build) (64-bit)
- Internet Explorer Version: 11.648.17134.0