The following note was on FBO.gov the last few days:
FBO is moving to beta.SAM.gov starting on November 8, 2019. Until then, FBO.gov remains the authoritative source for Federal Business Opportunities. Once FBO has fully transitioned, you will be directed to beta.SAM.gov for contracting opportunities. Visit beta.SAM.gov today to preview new features like saved searches and the ability to follow notices. For more information, please visit the beta.SAM.gov learning center or read our fact sheet."