[OPEN] Quest doesn't unlock: "Stone production - Masons"

Short description:
The subquest "Masons" which is part of the main quest "Stone production" doesn't unlock while all prerequisites seem to be met.

Screenshot:
http://img27.imageshack.us/img27/8986/jx2n.jpg

Possible cause:
Not completing the subquest "The Geologist" before reaching level 16

Prevention:
Complete the subquest "The Geologist" before reaching level 16

Workaround:
None

Related:

• Quest doesn't unlock: "Ranged Units - Longbows"
• Quest doesn't unlock: "The battle - Join the army"
• Quest doesn't unlock: "Free the homezone - More sectors"

Original thread(s): 1

Updates:
[2013-09-21] Added

I tried everything I could think of trying to get past level 5 without completing the quest "The geologist".
But I didn't find a way to achieve this, maybe you have to buy something from the merchant to trigger a quest that I didn't think of.

Conclusion: I don't think many of you will be affected by this issue

harry0, if you have any idea what might have happened or what you did to get past level 5, please! tell me.

Thanks,
Fexno