Guild Wars 2

I chose a mastery track and filled up the experience bar. However it still says I have 0 available mastery points.

Do you get the points by opening reward chests?

If yes, that would suck for me because the game crashes everytime I open a reward chest.

Have you gone into the UI and clicked on the mastery to complete it? They don’t auto complete when you fill the bar.

You should have some unspent points already, a number of core ones from achievements, and at least 1 HoT point from the story instance that takes you into the new maps. However, they do tend to drop from reward chests – if they’re causing you to crash, have you tried repairing the game client?

Stitch.1794:

Have you gone into the UI and clicked on the mastery to complete it? They don’t auto complete when you fill the bar.

You should have some unspent points already, a number of core ones from achievements, and at least 1 HoT point from the story instance that takes you into the new maps. However, they do tend to drop from reward chests – if they’re causing you to crash, have you tried repairing the game client?

how do I repair the game client?

You mean reinstalling?

https://help.guildwars2.com/entries/28148006-Repairing-the-Game-Client