The Mac computer continually [every power-up, reboot, or when the program is ran] asks for permission for an application to access a keychain.
The password is flagged to prompt every-time an application requests it.
Use this solution only if you are familiar with both the application or process which is asking, and the password it is requesting; as this will grant permanent permission.
(This is assuming the “Always Allow” option was tried previously.)
5.) Click the little plus sign in the lower left corner to “always allow access” to the password.
6.) Locate the application, [or process] or search for it and click “Add”.