Edited Unassigned: EPPlus corrupts files with shared formulas with error values [15560]

I open and save an xlsm file containing shared formulas having error values with EPPlus 4.1.0 like this:
```
var fi = new FileInfo("sharedFormulas.xlsm");
var package = new ExcelPackage(fi);
package.Save();
```
After saving the package, Excel couldn't open the file. It looks like the cells aren't marked as error typed.
The formulas contain user defined functions, but they don't seem to be the problem.
I attach the file before saving with EPPlus.