SYMPTOM:
In Strategy 10.x, below error appears in the DSSErrors log while the SSL authentication works both on Developer and Web.
[Network Classes][Error] SSL accept error : error:00000000:lib(0):func(0):reason(0)
In Project Source Manger configuration, the option of "Verify server certificate" is unchecked as shown below:

REPRODUCING STEPS IN TUTORIAL:
CAUSE:
This is a known issue with Strategy 10.x.
ACTION:
This issue has been addressed in Strategy 11.0. Please upgrade to take advantage of the fix when it is released.
Article Reference Number: KB440877