after I upgrad plugins to nopCommerce 4.50 geting this error Object reference not set to an instance of an object.

after i upgrade y surce code of my plugin i get this error
in local plugin work fine but when i install it on my server in nop ver  4.5 iget this issue
so i test the the build of nopcomerce of Plugin 'Cash On Delivery (COD) plugin and I get the same issue
any idea ?
here is the full log file

Unhandled exception. System.Exception: Plugin 'Cash On Delivery (COD)'. Object reference not set to an instance of an object.
Object reference not set to an instance of an object.

---> System.Exception: Plugin 'Cash On Delivery (COD)'. Object reference not set to an instance of an object.
---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Nop.Web.Framework.Infrastructure.Extensions.ApplicationPartManagerExtensions.<>c__DisplayClass14_4.<InitializePlugins>b__11(ValueTuple`2 pluginInfo)
   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)
   at Nop.Web.Framework.Infrastructure.Extensions.ApplicationPartManagerExtensions.InitializePlugins(ApplicationPartManager applicationPartManager, PluginConfig pluginConfig)
   --- End of inner exception stack trace ---
   at Nop.Web.Framework.Infrastructure.Extensions.ApplicationPartManagerExtensions.InitializePlugins(ApplicationPartManager applicationPartManager, PluginConfig pluginConfig)
   --- End of inner exception stack trace ---
   at Nop.Web.Framework.Infrastructure.Extensions.ApplicationPartManagerExtensions.InitializePlugins(ApplicationPartManager applicationPartManager, PluginConfig pluginConfig)
   at Nop.Web.Framework.Infrastructure.Extensions.ServiceCollectionExtensions.ConfigureApplicationServices(IServiceCollection services, WebApplicationBuilder builder)
   at Program.<Main>$(String[] args)

Are you using VS2022 or VS2019 ?

Using vs VS2022

i found the issue was in plugins.json

Getting same kind of error message when we moved from 4.2 to 4.5. It was from plugins.json..do u got a fix for this ?

It seems odd that "the issue was in plugins.json".
Here's an example.  Make sure you have all the fields with values.

{
  "Group": "Shipping rate computation",
  "FriendlyName": "Shipping Director",
  "SystemName": "Shipping.Director",
  "Version": "1.57",
  "SupportedVersions": [ "4.50" ],
  "Author": "nopTools",
  "DisplayOrder": 1,
  "FileName": "Nop.Plugin.Shipping.Director.dll",
  "Description": "Shipping Director allows a store owner to calculate shipping options and rates for complex scenarios"
}

(Also, check that your  "FileName" references the correct dll file.)