I have a private wiki and while I don't have root access to the server, I do have SSH credentials which allowed me to install and set up Scribunto/Lua.* Scribunto is working most of the time, but it is on the odd occasion, probably after an edit, that I get the infamous error message:
proc_open(): open_basedir restriction in effect. File(/dev/null) is not within the allowed path(s): [...] in [...]/extensions/Scribunto/includes/engines/LuaStandalone/LuaStandaloneInterpreter.php on line 154
The error reports I found all point to basic installation issues (forgetting to chmod stuff, not having access to SSH, etc.), but in my case, the error message is both sporadic and temporary.
- P.S. in Plesk, I had already set open_basedir to {WEBSPACEROOT}{/}{:}{TMP}{/}{:}/dev/null{:}/bin/bash