This situation can be confusing, especially when it seems like you have all the resources needed to upgrade your sawmill.

This behavior is not a bug — it is caused by a minor rounding inaccuracy in how your available resources are displayed on screen.

Here’s what’s happening:

• The upgrade requires a specific amount of reputation points or cash.

• While your total may appear to meet the requirement (for example, it shows 100), your actual value might be slightly lower — like 99.8, due to hidden decimal points.

• These decimal values are not shown in the interface, so it might look like you have enough when technically you don’t.

What can you do?

To fix this, try collecting just a bit more cash or reputation — once you cross the actual required threshold, the upgrade button will become available again.