@Nucci21 - here’s a post from @Emil that mentions three things to check and one of them has a link to a video on manually activating a solenoid -> Controller won’t start sprinklers.
If none of those troubleshooting steps provides any resolutions, then I’d do as @Franz suggested and reach out to Rachio’s support team - they seem to be great. I’d get your controller serial number and configuration information ready for them to speed up the troubleshooting (e.g. master valve Y/N, pump relay Y/N) along with the troubleshooting steps that have already been performed.