I'm sorry to hear about your trouble! Is this an RStudio Server Pro installation? If so, definitely feel free to reach out to our professional support team at email@example.com ! If I recall correctly off-hand, the verify-installation command is primarily intended for use with the Launcher. If you are not using the Job Launcher, you should probably resort to using the commands below.
A few other diagnostic pieces you can do to see if the service is up, or what is wrong:
journalctl -u rstudio-server
If you can share the output of these commands, that would be helpful (either here or when opening a support ticket)!