fix live events exception
fix live events exception

Change-Id: Ied31e7155ba3eb44464ab2647c1c7ce056139d66
Reviewed-on: https://gerrit.instructure.com/210281
Reviewed-by: Marc Phillips <b810f855174e0bc032432310b0808df2cf714fbc@instructure.com>
QA-Review: Marc Phillips <b810f855174e0bc032432310b0808df2cf714fbc@instructure.com>
Product-Review: Marc Phillips <b810f855174e0bc032432310b0808df2cf714fbc@instructure.com>
Tested-by: Jenkins

djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms