Unhandled exception (9daabba7)

Zeus version:
`1.5.2.21b875`

Firefox version:
`(56, 0)`

Geckodriver version:
`geckodriver-v0.18.0-linux64.tar.gz`

Error info:
```Traceback (most recent call last):
File "/home/pietro/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/home/pietro/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/var/search/selenium_search.py", line 80, in get_urls
ff_display = Display(visible=0, size=(800, 600))
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 34, in __init__
self._obj = self.display_class(
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 52, in display_class
cls.check_installed()
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/xvfb.py", line 38, in check_installed
ubuntu_package=PACKAGE).check_installed()
TypeError: __init__() got an unexpected keyword argument 'url'
```

Running details:
`Linux-5.8.0-44-generic-x86_64-with-Ubuntu-20.10-groovy`

Commands used:
`zeus.py -d inurl:test`

Log file info:
```2021-05-10 16:54:22,916;zeus-log;INFO;log file being saved to '/home/pietro/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/log/zeus-log-3.log'
2021-05-10 16:54:22,916;zeus-log;INFO;using default search engine
2021-05-10 16:54:22,916;zeus-log;INFO;starting dork scan with query 'inurl:test'
2021-05-10 16:54:22,917;zeus-log;WARNING;will not parse webcache URL's (to parse webcache pass -W)
2021-05-10 16:54:22,917;zeus-log;WARNING;only pulling URLs with GET(query) parameters (to pull all URL's pass -E)
2021-05-10 16:54:22,917;zeus-log;INFO;attempting to gather query URL
2021-05-10 16:54:22,917;zeus-log;INFO;setting up virtual display to hide the browser
2021-05-10 16:54:22,917;zeus-log;ERROR;selenium_search.pyc failed to gather the URL from search engine, caught exception '__init__() got an unexpected keyword argument 'url'' exception has been logged to current log file
Traceback (most recent call last):
File "/home/pietro/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/home/pietro/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/zeus-scanner/var/search/selenium_search.py", line 80, in get_urls
ff_display = Display(visible=0, size=(800, 600))
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 34, in __init__
self._obj = self.display_class(
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 52, in display_class
cls.check_installed()
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/xvfb.py", line 38, in check_installed
ubuntu_package=PACKAGE).check_installed()
TypeError: __init__() got an unexpected keyword argument 'url'

2021-05-10 16:54:24,194;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2021-05-10 16:54:24,194;zeus-log;INFO;getting authorization
2021-05-10 16:54:24,195;zeus-log;INFO;extracting traceback from log file
2021-05-10 16:54:24,195;zeus-log;INFO;attempting to get firefox browser version
```