Google translation: "Edited images cannot be exported. For a few days I have not been able to export edited images. Attached messages appear. Rebooting did not help. What can I do?"
Google translation of first screenshot: "Some exports were not performed. An internal calculation error has occurred.". Second screenshot: "There was a problem reading this photo in lightroom. You cannot make any changes to the photo."
The export error in the first screenshot has been reported by a number of people; the English version is "An internal math error occurred." Adobe has acknowledged the bug:
The error in the second screenshot, "There was a problem reading this photo in Lightroom", may be unrelated to the first. The photo could be corrupted on disk, or it could have bad file permissions. Upload it to Dropbox or similar and post the sharing link here. We can see if the photo is corrupted or the problem is something else.