Here we go, it’s been a long time I didn’t publish an article which consist of hardcore troubleshooting! Yes, you are correct. It took some time to resolve but finally the issue has been resolved. This time it’s regarding problem occurring while ‘save site as template’ and how we found the culprit.
User has raised the problem ticket by mentioning “facing problem while saving the site as template”, additionally the templates are getting saved in the solution gallery but not able to activate it also.
An unexpected error has occurred.
Troubleshoot issues with Microsoft SharePoint Foundation.
Correlation ID: acd95f50-4049-4625-9682-aa93aded118f
Further debugging in the SP ULS logs and we found some strange facts which are based on event receivers- please refer below-
SPSolutionExporter: Microsoft.SharePoint.SPException: Feature definition with Id 77658379-50ff-4e1e-a431-5652bee07a87 failed validation
Looking for ‘ReceiverAssembly’ attribute in manifest root node for solution
Looking for ‘ReceiverClass’ attribute in manifest root node for solution
The ‘Format’ attribute is invalid – The value ‘CheckBoxes’ is invalid according to its datatype
I debug further to find out where the problem is-
I downloaded the saved wsp’s from /_catalogs/solutions/Forms/AllItems.aspx to my desktop
Renamed it to .cab
Extracted all the contents and found some interesting facts along with manifest.xml file like-
Inside List Instances, I found ElementsFields.xml
Once I opened the above xml file, search for the checkboxes and found the following-
Further exploration on this, it seems that the checkbox attribute is invalid and needs to be modified.
After this one, the solution is pretty much simple, just go ahead and remove that affected column / remove the affected content type – does not require IISRESET also.