Troubleshooting

The Add-In model is quite complicated to setup, so the errors can be a lot. From our experience start troubleshooting with:

• CM Template Site
• Open IIS Site manually
• Recreate Trust
• Run "iisreset /noforce" on each SharePoint Server
• SPTrusted Token
• ULS Log
• Make sure the user who's adding the App is member of local administrators group on SharePoint WFE. Makes sure he's a direct member, group memberships are not supported by Microsoft.
• Clear the Browser Cache
• Contact Solutions2Share Support