groundfeel
Hi
This error is not from T4 plugin, its same whatever extension you install.
There is server 500 error on install http://prntscr.com/12jw0bw kindly raise the issue to server provider for internal server error. Also make sure the Path of log and tmp folder is correct in Global configurations.
PS : Do not make multiple replies with few words, Always give a single reply and include all information in it.
Regards