Guild Wars 2

I’m trying to do the battle of fort trinity but after the first objective the mission wont update. The mission just stays like in the picture.

i have the same problem but anyone gave me a solution , and i cant continue the kitten** history. this is the same post in the spanish forum
https://forum-es.gw2archive.eu/forum/support/bugs/Misi-n-Principal-Historia-Defiende-el-Fuerte-Trinidad-nivel-70