Service Release Candidates are not available at Rhino - Rhino - Downloads
Brian posts a link to download the latest public SCR, usually on Tuesdays at Rhino 7 Service Release Candidate Available - #26 by brian As of 5:20 pm EDT on 15 June 2021 the SRC update for this week has not been posted, and the one available for download is from last week with the bug.
Best bet is to roll back to the 7.7 Service Release which is available at Rhino - Rhino - Downloads Uninstall Rhino V7, then install the 7.7 Service Release after downloading it.