SharePoint 2010 – Unable to edit cell in Datasheet view – “This cell is read only”

When I try to edit the excel in SharePoint 2010 list in Datasheet view, I see an error saying that “The Selected Cells are Read-only” as shown the image below. I have verified user Permissions to the list. User Having Full control permissions to the list Checked-out by...

SharePoint 2013 error – Unexpected response from server, The status code of response is '500'. The status text of response is 'System.ServiceModel.ServiceActivationException'.

One of my client using SharePoint standalone machine for 400 people for their internal applications. Everything working as expected but one day all of sudden got an error message saying that, Unexpected response from server, The status code of response is '500'. The status...

Excel Online error - we are sorry we couldn't open your workbook it is possibly corrupt or using a file format is not supported

I am seeing an error when I try to open Excel file in SharePoint Office Excel with error message “Excel Online error - we are sorry we couldn't open your workbook it is possibly corrupt or using a file format is not supported” as shown the image below. ...