Do you get the same error if you try to compile the game (for distribution)?
Yep, it still wants me to open a file and gives the same error.
EDIT: I even reinstalled GameMaker, once just uninstalling and the second time a completely fresh install.
EDIT2: If I select my project file, I get some progress. This is the log from that:
Compile started: 5:49:14 PM
"C:\Users\8'- mk\AppData\Roaming\GameMaker-Studio\GMAssetCompiler.exe" /c /m=win /debug /config="Default" /tgt=64 /obob=True /obpp=False /obru=True /obes=False /i=4 /cvm /tp=2048 /mv=1 /iv=0 /rv=0 /bv=1757 /gn="IWBTEngine" /td="C:\" /cd="C:\GMS\Cache" /sh=True /dbgp="6502" /hip="192.168.56.1" /hprt="51268" /o="C:\\gm_ttt_11167\gm_ttt_77535" "C:\GameMaker-Studio 1.4\Projects\IWBTEngine.gmx\IWBTEngine.project.gmx"
Reading project file....finished.
Compile Constants...finished.
Remove DnD...finished.
Compile Scripts...finished.
Compile Objects...finished.
Compile Timelines...finished.
Compile Triggers...finished.
Compile Rooms...finished.
Compile Extensions...finished.
Final Compile...finished.
Saving IFF file... C:\GameMaker-Studio 1.4\Projects\IWBTEngine.gmx\IWBTEngine.win
Asset Compile finished: 5:49:17 PM
Compile finished: 5:49:17 PM
The crash dialog for AssetCompiler says Illegal characters in path, but I'm not sure which characters would be that. I've tried making a new folders with no special characters at all and I still get that.
(C:\GameMaker\Projects\IWBTEngine.gmx\ and C:\GameMaker\Projects\IWBTEngine\)
Sorry I have to pollute this thread with this, but the GameMaker forums are down right now and I have no idea where else I could get help debugging this.
EDIT3: I figured out what the issue was. "/o="C:\\gm_ttt_11167\gm_ttt_77535"" there are two slashes, C:\\. This is because in preferences the Temp Directory was set to C:\. I'm not sure if C:\ is default or not, but I'd have to imagine not since it causes this error, so I must have set it to that.