Forum Discussion
Could not load file or assembly 'Microsoft.Office.Excel.WebUI after migration to SHarePoint 2016
I guess you are making use of Excel Services in your site, probably a WebPart on the site's home page.
Excel Services was deprecated in SharePoint 2016 and moved to a separate product called Office Online Server.
For more details see the article below and look for the section called "Excel Services in SharePoint":
https://docs.microsoft.com/en-us/sharepoint/what-s-new/what-s-deprecated-or-removed-from-sharepoint-server-2016
I guess you are making use of Excel Services in your site, probably a WebPart on the site's home page.
Excel Services was deprecated in SharePoint 2016 and moved to a separate product called Office Online Server.
For more details see the article below and look for the section called "Excel Services in SharePoint":
https://docs.microsoft.com/en-us/sharepoint/what-s-new/what-s-deprecated-or-removed-from-sharepoint-server-2016
Yes it was an excel web part and I solved it through the web part maintenance page.
I noticed that you can do the same thing by editing the default via SharePoint designer