Guild Wars 2

I was unable to access the Guild Decoration Vendor in Lake Doric today. After I finished the story the other day I went and purchased several decorations from him. Now I am unable to reenter the building.

Was he deactivated? Is it broken? Do I have to do the whole story again to gain access once again? And if I do that, once I leave a second time would I have to do the story a third time to gain access?

One of my guildies was able to gain access again. There is one distinct difference. I restarted the story and he hasn’t. So, does that mean if one restarts the story they no longer have access even though they earned the right to enter already?

It’s listed as a bug in the Wiki, so, perhaps, the Devs are working on it.

Heibi.4251:

One of my guildies was able to gain access again. There is one distinct difference. I restarted the story and he hasn’t. So, does that mean if one restarts the story they no longer have access even though they earned the right to enter already?

Yep. The same bug that made you unable to craft the protective tonic in Bitterfrost Frontier if you restarted the story.
As far as the game thinks, you need finished story to be able to entry, and you do not have your story finished.