Error while importing from STL file

Hello everyone.

The second day what is the problem with TincerCad.

The day before yesterday I made a file import.
And the project is visible to me.


But yesterday I tried to make an import, the same file.
And when importing an error. In this case, the working area is black

I also noticed that if you open a project, it is not displayed.


Tried it in different browsers.
What could be the problem?



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