PnPPoweShell-WriteObject/WriteError methods cannot be called

You have to use the Dispatcher which maintains a prioritized queue of work items for a specific thread. When a Dispatcher is created on a thread, it becomes the only Dispatcher that can be associated with the thread, even if the Dispatcher is shut down.

Please refer to this link for more information:

https://docs.microsoft.com/en-us/dotnet/api/system.windows.threading.dispatcher?redirectedfrom=MSDN&view=netframework-4.7.2