type error

### Step 1: Please describe your environment

* ZeroNet version: 0.72 rev 4555
* Operating system: linux
* Web browser: tor browser
* Tor status: always
* Opened port: no
* Special configuration: due to gevent for py 3.6 no longer being avalible it is using python 3.9

### Step 2: Describe the problem:

Unhandled exception: TypeError: '>' not supported between instances of 'int' and 'str' in /greenlet.py line 906 > Worker.py line 208 > 154 > BigfilePlugin.py line 401 > ContentManager.py line 1006 > 1000 > 887 > 902

#### Steps to reproduce:

launch zeronet then open in browser, then try to click on a zite. produces an error

Start with the traceback locations in Worker.py, BigfilePlugin.py, and ContentManager.py, and inspect how the Python 3.9 and gevent setup reaches the reported comparison. Reproduce the error by launching ZeroNet and opening a zite in Tor Browser. Done means the click no longer raises the reported TypeError.

Written by the indexing model from the issue text.