This has been happening with my latest game. But that is because I use a mod. This looks like it was added in the most recent patch (as I've never seen it b4). It is telling you that your current files in your 'Data' folder do not match the ones used when the game was created. Get in touch with the person who created the game. The files in your data folder must match the files in his data folder. (I believe they added this so people could not modd the CompEnhancement.txt file during the game to get cheap mounts/ships etc.).
Hopefully I have said something that helps (tired...must...go...to...bed
)
------------------
"We are all...the sum of our scars"....(paraphrased) Matt. R. Stover-'Blade of Tyshalle'.
"Human existance is all imagination...Reality is no more than a simple agreement among its participants that this is where we shall meet, and these are the rules that we shall abide by."- Kevin McCarthy/David Silva "The Family:Special Effects"..
"Long Live the Legion!!"-Comic book fandom...