Check your MultiTerm version by going to Windows icon and checking your MultiTerm folder, the version that is preferable is SDL MultiTerm 2017 Desktop (SR1_23639) also SDL MultiTerm 2019 with TermWebIntegrator 2.4.1 found here /wiki/spaces/DEVNOTES/pages/18841655
Notes
Uninstalling Java or a MultiTerm version user must restart PC
When installing MultiTerm TermWebIntegrator must be closed, if you had a previous version of MultiTerm installed please go to C:\Users\<username>\AppData\Roaming\TermWeb\TermWebIntegrator and delete the settings.json file.