Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
@GeraldCerdan1 The Scout’s registration is expired and outside of the grace period.
The other parent already has the parent-child relationship with the Scout. She can create a username (login) at my.Scouting and use the online registration to re-register the Scout using his already existing member ID number. Alternatively, you can use a paper application. If you use a paper application, be sure you include the Scout’s member ID number, so that a new one is not created.
Because your son’s membership is expired / lapsed and outside of the grace period, she will need to re-register him using the troop’s link at beascout.org. When she re-registers him, she will want to use his already existing member ID number, not create a new one.
If she needs help resetting her password, the Scoutly chatbot should be able to help her. She needs to use her member ID number: 134222121. The local council also has the ability to reset passwords, if needed.