Upgrade to NopCommerce 4.40 from Version 4.30

Hi,
I have the same error

Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object.
   at Nop.Web.Framework.Infrastructure.Extensions.ApplicationPartManagerExtensions.<>c.<InitializePlugins>b__14_3(PluginDescriptor pd)
   at System.Linq.Enumerable.SelectManySingleSelectorIterator`2.MoveNext()
   at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection)
.....

Any suggestion? Have I to check every plugin and verify the upper case :-( ??

Thanks in advance

BR
Massimo

I don't think you need to check "every plugin".  For core nopCommerce created plugins, just  Misc.Sendinblue.  If you have 3rd party or custom plugins check those.  The case of the name in the plugins.json file - e.g.
  "SystemName": "Misc.Sendinblue",
must match the case of the name of the folder
  \Plugins\Misc.Sendinblue