This manifests itself when opening XSLX files generated by Microsoft ReportViewer control.
XLWorkbook_Load.cs line 857:
```
xlCell._cellValue = cell.InlineString != null ? cell.InlineString.Text.Text.FixNewLines() : String.Empty;
```
should be changed to:
```
xlCell._cellValue = cell.InlineString != null && cell.InlineString.Text != null ? cell.InlineString.Text.Text.FixNewLines() : String.Empty;
```
XLWorkbook_Load.cs line 857:
```
xlCell._cellValue = cell.InlineString != null ? cell.InlineString.Text.Text.FixNewLines() : String.Empty;
```
should be changed to:
```
xlCell._cellValue = cell.InlineString != null && cell.InlineString.Text != null ? cell.InlineString.Text.Text.FixNewLines() : String.Empty;
```