Hi Ilya,
Before all, I just want to say - thanks for your feedback!
Now, regarding to your question:
Regarding the error you are facing when attempting to build Mesh - can you please clarify if you deleted depth maps via user interface or you’ve just deleted the folder in project.files?
Also please make sure that you configure Point Cloud as a source data for building Mesh operation and that the processing region contains any points.
I deleted depth maps via user interface. There was drop-down 'list' of what project contains (to be more accurate what chunk contains) on the left side. From there I just selected
"Depth Maps" then right-click on that to get more options and then I choose
"Delete depth maps" option. Later, I just chose options for making mesh. Yeah, I did select "dense point cloud". I have version 1.8.5 so there's no only "point cloud" as option - It's clarified wheter you making mesh from "point cloud" [sparse point cloud] or from "dense point cloud", or - almost forget from "DEM".
I did not change region at all - since when I build mesh from "DEM".
I just forgot that "DEM" can reconstruct model in 2.5D so there's no nicely reconstructed vertical surfaces.
That's the reason why I'm going into 3D arbitary mode reconstruction mesh from dense point cloud.
Hope that you satisfied with an answer.
It would be really nice to download, or at least to export some useful things from Agisoft Cloud - "on-line". I mean maybe to export model, or to export orthomosaic it would be quite useful - that's my suggestion for future updates.
I mean sometimes you don't need whole project for maybe investors, sometimes is quite enough to have just part of it - or exported part of it.
For download purposes, don't know If I missed maybe an option to "Pause" download. I see that option while processing project - locally. It's useful for doing that cause PC infrastructure can often be overloaded...
Have a nice day

J.K.