Chapter troubles can arise at any time for a variety of reasons. If any variable within the Chapter falls out of balance--leadership, finances, membership, strategic direction, etc--things could spiral downward quickly if a solid process is not in place to address the issue(s) at hand.
The Chapter should review the Fundamentals for Chapter Success and Chapter Benchmarks, to further identify areas that require strengthening. A good Chapter planning session may be needed, and/or a review of the Chapter's bylaws. Many problems can be solved by referring to the bylaws or strategic plan--they serve as guidelines for the Chapters operations and activities. If your leaders have lost enthusiasm for the Chapter mission, it might be time for an Extreme Chapter Makeover.