Unable to change password after upgrade.

[miyu]

We have upgraded a customer's development instance from Quebec to San Diego.
When I tried to change the password to make sure it works, I get a "Request in progress" screen for about an hour and the password is not changed.
I have customized the password policy before upgrade.
I don't know what is causing this.
What are the possible causes?

[KiranKumar Balu]

Thankyou @sari this helped for my purpose

[miyu · Accepted solution]

This was due to a bug caused by Upgrae from Quebec to San Diego.
This was resolved by installing the Key Management Framework plugin.
Thank you all very much.