[Startup] - add app.UseDeveloperExceptionPage();

[kicbar]

if (env.IsDevelopment())
{
    app.UseDeveloperExceptionPage();
    app.UseDatabaseErrorPage();
}
else
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}

[kicbar]

Add app.UseDeveloperExceptionPage(); https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.builder.databaseerrorpageextensions.usedatabaseerrorpage?view=aspnetcore-5.0&viewFallbackFrom=aspnetcore-3.1#Microsoft_AspNetCore_Builder_DatabaseErrorPageExtensions_UseDatabaseErrorPage_Microsoft_AspNetCore_Builder_IApplicationBuilder_