'bool' is not iterable in FileRequest.py line 229 > BigfilePlugin.py line 677

### Step 1: Please describe your environment

* ZeroNet version: 4555
* Operating system: Linux
* Web browser: FF
* Tor status: available
* Opened port: yes

### Step 2: Describe the problem:

For the last 24 hours the debug.log shows 529 errors:

> ConnServer GetFile exception: TypeError: argument of type 'bool' is not iterable in [FileRequest.py line 229](https://github.com/HelloZeroNet/ZeroNet/blob/py3/src/File/FileRequest.py#L229) > [BigfilePlugin.py line 677](https://github.com/HelloZeroNet/ZeroNet/blob/py3/plugins/Bigfile/BigfilePlugin.py#L677)

Start with the linked code at src/File/FileRequest.py line 229 and plugins/Bigfile/BigfilePlugin.py line 677, tracing how the file request reaches the Bigfile handler. Reproduce or inspect the reported TypeError and identify why a boolean is treated as iterable. Done means the request no longer raises this exception and the debug.log error is resolved.

索引モデルが issue の本文から書いたものです。