Hmm, so then it sounds like Umbraco is failing to locate the Varaint property editor for some reason.

Have your tried an app pool recycle to see if that brings it back? If it does, then it sounds as if it's being lost in memory. If it's not found after recycle, then is it possible the DLLs have reverted at all?

Matt

Are there any other references to TC in your log file? Strange that it was able to find it and then it's not 🤔

Source value:
Umbraco.Core.Models.DataTypeDefinition ---> System.InvalidOperationException: Could not find property editor with alias TeaCommerce.VariantEditor
   at Umbraco.Web.Models.Mapping.PreValueDisplayResolver.Convert(IDataTypeDefinition source)
   at Umbraco.Web.Models.Mapping.PreValueDisplayResolver.ResolveCore(IDataTypeDefinition source)
   at AutoMapper.ValueResolver`2.Resolve(ResolutionResult source) in c:\dev\AutoMapper\src\AutoMapper\ValueResolver.cs:line 17
   at AutoMapper.PropertyMap.<ResolveValue>b__6(ResolutionResult current, IValueResolver resolver) in c:\dev\AutoMapper\src\AutoMapper\PropertyMap.cs:line 127
   at System.Linq.Enumerable.Aggregate[TSource,TAccumulate](IEnumerable`1 source, TAccumulate seed, Func`3 func)
   at AutoMapper.PropertyMap.ResolveValue(ResolutionContext context) in c:\dev\AutoMapper\src\AutoMapper\PropertyMap.cs:line 127
   at AutoMapper.Mappers.TypeMapObjectMapperRegistry.PropertyMapMappingStrategy.MapPropertyValue(ResolutionContext context, IMappingEngineRunner mapper, Object mappedObject, PropertyMap propertyMap) in c:\dev\AutoMapper\src\AutoMapper\Mappers\TypeMapObjectMapperRegistry.cs:line 119
   --- End of inner exception stack trace ---

Is there anything to do with Umbraco's TypeFinder not being able to load the dll?

Yea, it will be. Ultimately Umbraco isn't finding the provider at all so it's not going to be available anywhere until this is resolved.

Maybe check file permissions on the TeaCommerce.Umbraco.Configuration.dll too as this is where the property editor lives and should be found by Umbracos type finder.

Can I check file permissions on a DLL in Azure? Not even sure how to?

And what file permissions should be set?

yea, I'm not sure either. Not sure why it would be blocked, but sometimes they can be on regular file systems, I'd assume they can be in Azure too 🤷‍♂️

What version of Umbraco are you using? It can sometimes fail to load a DLL if the DLL it's trying to load was compiled against a newer version of .NET, I don't think that would be the case though here as we never compile against a newer version.

In your local setup, if you right click on the TeaCommerce.Umbraco.Configuration.dll dll and go to properties to see if the DLL is saying it's blocked?

Umbraco version 7.15.3 assembly: 1.0.7180.24662

Right clicked the DLL, can't see anything saying Blocked, I can see checkboxes for Hidden and Read-Only, both not selected.

TeaCommerce.Umbraco.Configuration.dll

File Version: 3.3.7207.28303 Product Version: 3.3.3

Manifest file:

{
  propertyEditors: [{
    alias: 'TeaCommerce.StorePicker',
      name: 'Tea Commerce: Store picker',
      editor: {
      view: '~/App_Plugins/TeaCommerce/PropertyEditors/store-picker.html',
        hideLabel: false,
        valueType: 'INT'
      }
  },{
    alias: 'TeaCommerce.VatGroupPicker',
      name: 'Tea Commerce: VAT group picker',
      editor: {
        view: '~/App_Plugins/TeaCommerce/PropertyEditors/vat-group-picker.html',
        hideLabel: false,
        valueType: 'INT'
      }
  },{
    alias: 'TeaCommerce.StockManagement',
      name: 'Tea Commerce: Stock management',
      editor: {
        view: '~/App_Plugins/TeaCommerce/PropertyEditors/stock-management.html',
        hideLabel: false,
        valueType: 'STRING'
      }
  }],
  javascript: [
    '~/App_Plugins/TeaCommerce/PropertyEditors/store-picker.controller.js',
      '~/App_Plugins/TeaCommerce/PropertyEditors/vat-group-picker.controller.js',
      '~/App_Plugins/TeaCommerce/PropertyEditors/stock-management.controller.js'
  ]
}

Ok, your manifest is fine, but your DLL version isn't.

The DLL version in the 3.4.1 distro that we upgraded to yesterday has a TeaCommerce.Umbraco.Configuration.dll version number of 3.4.1, so I think your DLLs have gotten out of sync. Something is resetting your DLLs.

You can reinstall TC on your local to see if that fixes it locally. If it does, then you know it's because your DLLs are out of whack. Then you need to chase down why.

Ok great, how can I re-install TC? When I try to install from the local package it says - Package already installed

Is there another way to install it?

Can I un-install and then re-install? Hopefully, that won't break anything doing it that way?

Hmm, I think you can modify the App_Data\packages\installed\installedPackages.config file, locating the entry for TC and changing it's version attribute to be like 3.3.9 for Umbraco 7. I think that should allow it to be reinstalled.

If you have your code + bin folder in source control, it might be worth committing it at that point and then you'll be able to know if something else trys to reset the DLLs later as it'll say they have changed.