Hello Fridays Girl, thanks for reaching out! You'll want to access the Sage Knowledgebase for articles regarding Sage 300 CRE activation at support.na.sage.com

Product codes are located at https://customers.sagenorthamerica.com/ for customers, and at https://partners.sagenorthamerica.com/ for partners as well. 

If you require further support from here, I would suggest contacting Sage Support via online chat or phone (please note that the phone number is 1-866-996-7243) during regular business hours (Monday to Friday, 9am to 8pm ET) –
https://sagecity.na.sage.com/sage_city_town_hall/p/sage-product-support

Hope this helps!
Erzsi

Since 17.1 Sage uses the internet to validate licensing, which means that if you do not connect to the internet your computer/server is unable to validate that you have active licenses. You may need to connect to the internet more frequently, to prevent any further issues from reoccurring. 

Thank you both for your help.  I stayed connected to wifi for several days, and it cleared up.

I did know that Sage needed to "communicate" with my computer occasionally, but never had this happen before.

You should connect with Sage Support they can assist