Guildhest Issues

I am a new mentor working towards unlocking the mentor roulette and this is not ok:


https://www.bing.com/images/blob?bcid=shVnYoXtFusHpg

I have tried multiple days to get past this guildhest and you cant unsynch them. IDK what to do because I have tried party finder as a last ditch effort. Squenix needs to fix this issue, I think its due to it being a full party instance and the others (atleast the ones before it) are light party, so they fill up before I can get a group who just specifically ques for this.