Real Fuels mod isn't working right and when I upgrade the tank material in the tech tree, it still says it's locked

[Xxx_Tyler_xxX]

I've been using the latest version of ksp (1.12.3) and rp-1, I followed the wiki guide for rp-1 all the way through (so I installed rp-1 using ckan basically),  everything seemed normal and working but then  I found this issue where, I unlocked the first material science upgrade in the tech tree which allows you to use aluminum fuselages (last image) and waited for it to finish in the build list, then when I selected aluminum for the material it said that it wasn't unlocked (second image), also it allows me to select all of the tank types even though I don't have all of them unlocked (first image). I've tried re-installing the rp-1 express mod but that doesn't work, I'm not sure what else I should do. Another weird thing I noticed is that when I started a new career, the text windows for the regular game (that are like the mini tutorial) doesn't pop up only the ones for the mods do, not sure if this would help but I thought I'd mention it.

[jimmymcgoochie]

Try purchasing the tank upgrade in R&D and then building the rocket. Just finishing the research isn't enough, you have to buy the parts/upgrades in order to use them.

I think being able to select any material for each tank type is an intended feature to allow testing/prototyping with upgraded tanks before you research them, similar to how engines and avionics can be assigned configs you haven't unlocked yet, though it may be a bit confusing at first when it gives you all the options and you can only use one of them.