Your Job won't start at the moment because Senta needs more information.
For Senta to start Jobs that repeat -- annual accounts production, or monthly payroll, for example -- it needs to have a date on which to repeat. Senta can't start scheduled Jobs until that date is available. You will see a warning on the client's Services tab like this:
Don't worry though, this isn't a permanent problem. As soon as the date is available, Senta will automatically start to kick off those Jobs going forward.
How does the date become available?
Senta doesn't mind how the date becomes available... it could be typed in by you, or imported from CSV, or synced with another Service. Whichever method causes the date to be added is fine.
Usually though, you will type in the date that's missing, on a form that's gathering information. Senta is set up to ask you for all the information it needs to start Jobs, so it probably just means you need to fill in one of those forms.
For example, the accounts production Service that is provided with Senta relies on the accounting reference date or year end date being present. That date is requested when you add a client. There is a "limited company details" form, a "partnership details form" and so on. Each of those has the year end date or accounting reference date on it. There is a step in each of the client take-on Jobs that will prompt you to fill in the form.
So, if you haven't already done so, you can just go and complete that Task. You'll be presented with the ARD or year end date field to fill in, among others.
Or, if you prefer, you can just edit the client and add the date to the appropriate tab -- limited company details, partnership details, etc.
Whichever way you do it, when you add the date and Save, Senta will soon pick up the date and kick off your Job. Your client's Services tab will reflect that.