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2018-12-07 13:45:36,821 [YDAWBH120][Thread:15][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.Web.HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

See http://go.microsoft.com/fwlink/?LinkID=314055 for more information. ---> System.Web.UI.ViewStateException: Invalid viewstate. 
	Client IP: 173.205.33.24
	Port: 1423
	Referer: 
	Path: /default.aspx
	User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
	ViewState: 5hllTQwjl16Po9e4twdhbhoKMyJPHRx1LBAy BaBeTUdSZsBUWjE4dqrVKzDDzaeJdtMEYxlk5a9sz7uTL7ENfFHdE/p2of1jOAIQ2kCLyF1hYQ08poaKsPdZeHL3TxntUYmlKkryOtX4Fvsrp8RpCWkYRjealGPNlc Y4fVLe1CllWksNZypxigM0OZkDZ1oXW9N2vUT4mJ7M4kxaO/sxpKsRafWxQqUAt7qhayIum83Ul6udOF4XXGUnjlHt90bbyP0GKTBb2LP7lBs3ubsPzTsKjemihhH7Th2KlLETjVZNgcL U2DezB06dRcYen/ZnbYV/OY0E5D5Eb1RNNkbsOcHTngudkzaCbjfECxq Yc/JTxFa/SgUfV9h/F8isSzHc2w==
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString, Purpose purpose)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter2.Deserialize(String serializedState, Purpose purpose)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter2 formatter, String serializedState, Purpose purpose)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2018-12-07 13:45:36,837 [YDAWBH120][Thread:15][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?tabid=588&error=An unexpected error has occurred&content=0
System.Web.HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

See http://go.microsoft.com/fwlink/?LinkID=314055 for more information. ---> System.Web.UI.ViewStateException: Invalid viewstate. 
	Client IP: 173.205.33.24
	Port: 1423
	Referer: 
	Path: /default.aspx
	User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
	ViewState: 5hllTQwjl16Po9e4twdhbhoKMyJPHRx1LBAy BaBeTUdSZsBUWjE4dqrVKzDDzaeJdtMEYxlk5a9sz7uTL7ENfFHdE/p2of1jOAIQ2kCLyF1hYQ08poaKsPdZeHL3TxntUYmlKkryOtX4Fvsrp8RpCWkYRjealGPNlc Y4fVLe1CllWksNZypxigM0OZkDZ1oXW9N2vUT4mJ7M4kxaO/sxpKsRafWxQqUAt7qhayIum83Ul6udOF4XXGUnjlHt90bbyP0GKTBb2LP7lBs3ubsPzTsKjemihhH7Th2KlLETjVZNgcL U2DezB06dRcYen/ZnbYV/OY0E5D5Eb1RNNkbsOcHTngudkzaCbjfECxq Yc/JTxFa/SgUfV9h/F8isSzHc2w==
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString, Purpose purpose)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter2.Deserialize(String serializedState, Purpose purpose)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter2 formatter, String serializedState, Purpose purpose)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2018-12-07 13:45:41,103 [YDAWBH120][Thread:64][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.Web.HttpException (0x80004005): The state information is invalid for this page and might be corrupted. ---> System.Web.UI.ViewStateException: Invalid viewstate. 
	Client IP: 173.205.33.26
	Port: 2901
	Referer: 
	Path: /default.aspx
	User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
	ViewState: QaFzRAfaKEN mwMgRdUUBIGTyX4w6t/HO280P5VP5bYv3PTtlrGKCyQxep07OAXlYqXzaAP68fI/ g1x2cJ4MAbe29EQ8KkeeKVm8bBTIZyRrESRClq3ZCDW3OvhsQnt8K93H8wCvEp7n1xaRIohGwfK4aQ3EIfVSQtNvHRfHrAoMW1g3BqvOb uNp3H3aDekHmUS8ukHSYyGx58yzKlbVb0sdk9vg3hFyIwW8cEjYrtGbuyUTHJMIYVRuIA98SvJ8v1LZXUki00803r2pfQYpNSNXu/7n3oMYZdkI3X0ITsAEggSYX5Sc C1M0 nfU14wnFibt5Ona36YK6FcYQk/nHGfvR0hYRChAl5MdyIJcJUuRXPmMrm 5OyF1hZxblV9er5w== ---> System.FormatException: Invalid length for a Base-64 char array or string.
   at System.Convert.FromBase64_Decode(Char* startInputPtr, Int32 inputLength, Byte* startDestPtr, Int32 destLength)
   at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
   at System.Convert.FromBase64String(String s)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString, Purpose purpose)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter2.Deserialize(String serializedState, Purpose purpose)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter2 formatter, String serializedState, Purpose purpose)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   --- End of inner exception stack trace ---
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2018-12-07 13:45:41,103 [YDAWBH120][Thread:64][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?tabid=588&error=An unexpected error has occurred&content=0
System.Web.HttpException (0x80004005): The state information is invalid for this page and might be corrupted. ---> System.Web.UI.ViewStateException: Invalid viewstate. 
	Client IP: 173.205.33.26
	Port: 2901
	Referer: 
	Path: /default.aspx
	User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
	ViewState: QaFzRAfaKEN mwMgRdUUBIGTyX4w6t/HO280P5VP5bYv3PTtlrGKCyQxep07OAXlYqXzaAP68fI/ g1x2cJ4MAbe29EQ8KkeeKVm8bBTIZyRrESRClq3ZCDW3OvhsQnt8K93H8wCvEp7n1xaRIohGwfK4aQ3EIfVSQtNvHRfHrAoMW1g3BqvOb uNp3H3aDekHmUS8ukHSYyGx58yzKlbVb0sdk9vg3hFyIwW8cEjYrtGbuyUTHJMIYVRuIA98SvJ8v1LZXUki00803r2pfQYpNSNXu/7n3oMYZdkI3X0ITsAEggSYX5Sc C1M0 nfU14wnFibt5Ona36YK6FcYQk/nHGfvR0hYRChAl5MdyIJcJUuRXPmMrm 5OyF1hZxblV9er5w== ---> System.FormatException: Invalid length for a Base-64 char array or string.
   at System.Convert.FromBase64_Decode(Char* startInputPtr, Int32 inputLength, Byte* startDestPtr, Int32 destLength)
   at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
   at System.Convert.FromBase64String(String s)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString, Purpose purpose)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter2.Deserialize(String serializedState, Purpose purpose)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter2 formatter, String serializedState, Purpose purpose)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   --- End of inner exception stack trace ---
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)