Don't need the log to tell you what's not working - I only drew sprites for the Map Editor UI for UFO.
If you want to use this in TFTD, then you'll need to add the UI sprites either through a mod or by adding it to the "standard" folder in your installation. This means:
1. Making a copy of the image file located at standard/xcom1/Resources/Extended/UI/mapeditor_icons.png, editing it to the TFTD palette, and placing it either in the standard/xcom2 folder or your own mod.
2. Referencing this new image file in a ruleset file, either in standard/xcom2/extraSprites.rul if you put the image in the standard folder or somewhere in your own mod, containing the following lines:
extraSprites: # must be somewhere under the extraSprites header
- type: MapEditorIcons
width: 320
height: 240
subX: 32
subY: 40
files:
0: Resources/Extended/UI/mapeditor_icons.png #this is for putting it in the standard folder, change it to wherever you put the image