Never mind, I was able to fix it.
What I did was look through the console.log and found this
ERROR: ServerLoadSaveFile_Tick() - Bad line "" -16.25 649.5 1.4 2 0 32 0 0 1 1 1" - expected brick line but found no uiname
So what I then did was open the .bls file with Notepad, and then deleted that line.
Thinking about it, I should've looked through searches on the forums first. Oh well :P