Unable to save site as template

User has raised the problem ticket by mentioning facing problem while save site as template, additionally the templates are getting saved in the solution gallery but not able to activate it also.

Error Message

An unexpected error has occurred.
Troubleshoot issues with Microsoft SharePoint Foundation
Correlation ID: acd95f50-4049-4625-9682-aa93aded118f

Troubleshooting

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. 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 List Instances, Modules, Property bags, web template. Inside List Instances, I found ElementsFields.xml Once I opened the above xml file, search for the check boxes and found the following

Further exploration on this, it seems that the checkbox attribute is invalid and needs to be modified.

Resolution

Remove that affected column / remove the affected content type – does not require IISRESET also.

Categories: Site, Template

Tags: ElementsFields.xml, manifest.xml, Publishing-Feature, save-site-as-template, SharePoint 2013, sharepoint 2013 save site as template, template, unexpected error