[ url_image_preview gtk3] Error opening configuration
Trying to open the configuration menu for url_image_preview from the gtk3 branch I get the following error:
File "/usr/lib/python3.6/site-packages/gajim/plugins/helpers.py", line 114, in wrapper
result = f(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/gajim/plugins/gui.py", line 239, in on_configure_plugin_button_clicked
plugin.config_dialog(self.window)
File "/usr/lib/python3.6/site-packages/gajim/./data/plugins/url_image_preview/config_dialog.py", line 45, in __init__
OptionType.VALUE, self.plugin.config['PREVIEW_SIZE'],
File "/usr/lib/python3.6/enum.py", line 324, in __getattr__
raise AttributeError(name) from None
AttributeError: VALUE```
Not sure if this is a result of the first error but starting gajim with this plugin enabled I get:
```Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/gajim/./data/plugins/url_image_preview/url_image_preview.py", line 383, in _check_mime_size
if file_mime.lower() not in ACCEPTED_MIME_TYPES:
AttributeError: 'NoneType' object has no attribute 'lower'```