(1.10.2-12.18.3.2511, PC)
So, recently I was looking for reactor maps that didn't require mods (I didn't know how to make a modded map or server originally), when I came across a mod (Big Reactors). It was updated to Extreme Reactors so I went through a tutorial and found out that the stuff used for it required other mods, and I went through what felt like a year getting all the required mods (1 mod required 1.10.2 so I had to redownload everything to 1.10.2).
I got everything set up and it worked nice, and I had previous experience with making a Minecraft server. I saw on the Forge installer that it had a server installer, but when I leaded it to my server folder it said there are already files there, so I made a new folder and let it set up there. I agreed to the EULA, started it for the first time, port forwarded it, put the mods from the local to the server (in /mods), made a config folder and put all the local /config into the server /config, copied the world files from local to server and started it up.
I put in my IP and also the port, and it started, until it came up with Skipping Block Reactor(something), loads of those. Once I was in, I only saw the signs that were on the modded blocks.
I emptied the world folder, let it make a new world, and got my modded blocks. I tried placing one, but it just appeared for a fraction of a second. The block looked good, it looked how it was supposed to.
Then I tried pressing Q on the block (to drop it). It didn't work, so I tried going to my inventory and dragging it out the screen (to drop it). It disappeared, but it didn't go onto the ground. Yes, it was gone from my inventory, but no, it didn't stay on the ground.
Mods used:
CodeChickenLib
CoFHCore
EnderCore
EnderIO
ExtremeReactors
ThermalDynamics
ThermalFoundation
zerocore
These are all supported for 1.10.2, and I've loaded in the modded local Minecraft and tried to connect, and it didn't work.
Can somebody please help me?