MCL-11510 is marked as Resolved but currently I am not able to install the launcher (I assume because of the SSL error). WEB-5634 has this comment:
TLSv1.2 was accidentally enabled on a certain endpoint. The change is rolledback now.
I assume that is a typo and it is meant to be TLSv1.3 which is not supported by Win7 which I am using.
MCL-22317 looks to be similar for the reinstallation, but I was getting the SSL error before that. If the root cause is the same then it could be. The workaround to repair the Launcher toes not work, and I do not have another computer to manually copy the installed files.