Schrob

Why not simply add some money and science from the debug/cheat menu, buy the stuff you need, make a nice station and put it in orbit like Snark said.

Only when preparing that screenshot I noticed my 2 scientists weren't in the MPL like I was sure they were. After transferring them everything worked fine again and I'm happily processing data now. Like I said: I was overlooking something simple. Thanks everyone for the help !

Lab is completely empty. I tried a new ship and a new save, but the button stays disabled I have 2 level 2 scientists on board, but I don't get up to the point where I can process; I can't get the data in

No, first visit to Eve and first attempt to store data

I always used to be able to put data in the Mobile Processing Lab, but now the 'science beaker' button is always disabled, even on crafts that used to work. I removed all mods but still the problem persists. I'm sure I'm overlooking something simple, but can't figure out what.