pb.lua:249: attempt to concatenate a nil value (local 'article_body')
stack traceback:
pb.lua:249: in main chunk
[C]: in function 'xpcall'
/usr/local/share/lua/5.3/cgilua.lua:181: in function 'cgilua.pcall'
(...tail calls...)
[C]: in function 'xpcall'
/usr/local/share/lua/5.3/cgilua.lua:181: in function 'cgilua.pcall'
/usr/local/share/lua/5.3/cgilua.lua:641: in function 'cgilua.main'
/usr/local/share/lua/5.3/wsapi/sapi.lua:56: in function 'wsapi.sapi.run'
(...tail calls...)
[C]: in function 'xpcall'
/usr/local/share/lua/5.3/wsapi/common.lua:270: in function 'wsapi.common.run_app'
/usr/local/share/lua/5.3/wsapi/common.lua:297: in function 'wsapi.common.run'
/usr/local/share/lua/5.3/wsapi/cgi.lua:19: in function 'wsapi.cgi.run'
/usr/local/lib/luarocks/rocks/cgilua/5.2.1-1/bin/cgilua.cgi:21: in main chunk
[C]: in ?