Size limit for luup file uploads?

I am trying to install RFXtrxcom plugin but keep getting an error uploading the lua file. I have been able to upload all the RFXtrx files except the lua one. I was on firmware 1.6 something and kept getting error: “haserl CGI Error Attempted to send content larger than allowed”. I upgraded to the latest firmware and now I see “internal server error” when trying to load the same file. Is there another way to load this? I haven’t done a ton of configuration on my Vera but is there a space constraint? The only other plugin I had was the myQ garage one.

I posed in the RFXtrxcom thread as well, but this seems like a generic issue with uploading a luup file. Is there a size limit, and if so how do I get around it, or how is this file working for others?