All scheduled jobs fail to run on any Scheduler Data Provider in the 800xA system
No jobs are run on the system either using the Run Now button on the Scheduling Definition Aspect or when dispatched by the scheduler either with a periodic or cyclic time. And, if there are multiple Scheduler Service Providers in the system, jobs will not run on any of them. Also, Run Now button also not working and not allowing to select the service provider option in the sheduler.
What will be the reason?
If you can not select providers it sounds like something is corrupted in the Scheduler Service or its setup.
I suggest deleting all Scheduler groups and providers from the Service Structure and create one new group and a single provider and go from there.
Firewall config lacking for Scheduler?
Check [Workplace Structure]Web System Workplace:System Event List for error messages during the above. If you see "Installation problem..." messages your software configuration is not correct and you need to ensure all computers are properly installed with all system extensions, and with same version.