I recently started a server for my friends and I to play. It's running Minecraft version 1.12.2 on the FTB Ultimate Reloaded modpack, which I've modified a bit by adding/removing some mods. What's causing issues is, as we continue to play I'm adding/removing mods rather than doing it before actually creating the world. Last night I added in about 10 different mods and deleted four mods: CC:tweaked, Computronics, PeripheralsPlusOne, and Plethora. Upon logging in after doing so I was greeting with the messages in my chat box as indicated in the image attached. We hadn't started using any of the things offered by Computercraft so there shouldn't have really been any items in the immediate area that could have caused an issue, and we haven't explored much of the world yet. Is this a problem, and how do I fix the problem if so?
It's not filling up as an error in my server GUI as far as I can tell which is why I haven't posted a log, but if there's something else that would be more helpful then please let me know. I'm pretty new to all of this stuff and am still trying to figure out how it all works. Thank you!