SSRS Custom Authentication Issue with Running Subscriptions

[sami1990]

have implemented SSRS Custom Authentication. Everything is running correctly in SQL Server 2022 ReportServer, except for subscriptions. I have added new subscriptions, but when they are executed, I receive the following error:

`ERROR: Exception caught instantiating Forms report server extension: System.TypeLoadException:

Inheritance security rules violated while overriding member: 'Test.RSecurity.Authorization.CreateSecurityDescriptor(Microsoft.ReportingServices.Interfaces.AceCollection
, Microsoft.ReportingServices.Interfaces.SecurityItemType, System.String ByRef)'.
Security accessibility of the overriding method must match the security accessibility of the method being overriden.

at System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type)
at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)
at System.Reflection.Assembly.CreateInstance(String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at Microsoft.ReportingServices.Diagnostics.ExtensionClassFactory.<>c__DisplayClass15_0.b__0()
at Microsoft.ReportingServices.Diagnostics.RevertImpersonationContext.<>c__DisplayClass1_0.b__0(Object state)
at System.Security.SecurityContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Security.SecurityContext.Run(SecurityContext securityContext, ContextCallback callback, Object state)
at Microsoft.ReportingServices.Diagnostics.RevertImpersonationContext.Run(ContextBody callback)
at Microsoft.ReportingServices.Diagnostics.ExtensionClassFactory.CreateExtensionObject(Extension extConfig, Boolean typeOnly).
library!WindowsService_0!2538!06/05/2025-14:15:28:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ServerConfigurationErrorException: Could not load Authorization extension, Microsoft.ReportingServices.Diagnostics.Utilities.ServerConfigurationErrorException: The report server has encountered a configuration error. ;`

I have tried all SecurityRules like
[assembly: SecurityRules(SecurityRuleSet.Level1)]
or
[SecurityCritical]