We have migrated our site from Episerver 5.2 to 7.0. For one page in edit mode it showing following error message. We also not able to delete that page.
User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0Url https://servername:443/EPiServer/CMS/no/TestPage,,2565_8541/?id=2565_8541&epieditmode=true&epiworkspaceactive=trueReferer https://servername/EPiServer/CMS/Home?language=noSpecified argument was out of the range of valid values.Parameter name: indexDescription: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.Parameter name: index