First, right click on the area properties to determine what tile-set that particular area is supposed to be using. I suspect that it is that tcr10 OR tcr40 tile-sets, which you have referenced above with several different file names.
3. tcr10doors
4. tcr10_edge
5. tcr40doors
6. tcr40_edge
From those names, look for tcro10.set and tcr40.set files. Inside of those are where the errors are coming from (IF they are the tile set used for that area in the tool-set). Basically, an error like the blank white tile viewed in your images is caused when a tile variation is defined in the .set file but has no actual file associated with that name in existence, so you either have to create the missing tile or find the entry that is defined yet missing and correct that, by either removing the extra entry or creating the missing tile.
edit:
Most likely, it is an error in the specific groups that are painted, whereby the group has a tile referenced for a position that does not exist in the actual tile-set. This could be caused by say a 3x3 group, defining a connection to a possible tile of say "grass" that would have a specific reference,,,it gets a little complicated, you would have to learn a bit about how tile-sets are created etc... what a "group" definition is, what a "feature" definition is, etc...