Although I've installed a number of previous versions of Forge, the latest version forge-1.16.5-36.2.4-installer.jar appears to run successfully but does not insert an entry into the official Minecraft Launcher, despite reporting a successful installation.
The launcher was closed at install time
I have previously run 1.16.5 in its unmodified form
The 1.16.5-forge-36.2.4 directory and its json file were successfully created in .minecraft/versions/
I've checked both the top and bottom of the launcher's version list, and not found this version of Forge
I've attempted repeated reinstalls, both with and without removing the 1.16.5-forge-36.2.4 directory, to no avail
Install log: https://gitlab.com/-/snippets/2175885
Java version info:
openjdk version "11.0.11" 2021-04-20
OpenJDK Runtime Environment (build 11.0.11+9-Ubuntu-0ubuntu2)
OpenJDK 64-Bit Server VM (build 11.0.11+9-Ubuntu-0ubuntu2, mixed mode, sharing)
I've read a number of forum posts about similar problems, but none of the solutions appear to apply to my particular situation.
Thanks for your time