After running fine Sab fails to launch and throws this error.

[Slagazor]

2022-04-23 21:59:29,785::INFO::[sabnzbdplus:1096] --------------------------------
2022-04-23 21:59:29,786::INFO::[sabnzbdplus:1097] sabnzbdplus-3.0.0-develop (rev=unknown)
2022-04-23 21:59:29,787::INFO::[sabnzbdplus:1098] Full executable path = /usr/bin/sabnzbdplus
2022-04-23 21:59:29,788::INFO::[sabnzbdplus:1108] Platform = posix
2022-04-23 21:59:29,789::INFO::[sabnzbdplus:1109] Python-version = 3.8.10 (default, Mar 15 2022, 12:22:08)
[GCC 9.4.0]
2022-04-23 21:59:29,789::INFO::[sabnzbdplus:1110] Arguments = /usr/bin/sabnzbdplus
2022-04-23 21:59:29,790::INFO::[sabnzbdplus:1114] Not inside a docker container
2022-04-23 21:59:29,790::INFO::[sabnzbdplus:1117] Preferred encoding = UTF-8
2022-04-23 21:59:29,790::INFO::[sabnzbdplus:1124] SSL version = OpenSSL 1.1.1f 31 Mar 2020
2022-04-23 21:59:29,791::INFO::[sabnzbdplus:1171] Using INI file /home/rob/.sabnzbd/sabnzbd.ini
Traceback (most recent call last):
File "/usr/bin/sabnzbdplus", line 1674, in <module>
main()
File "/usr/bin/sabnzbdplus", line 1180, in main
sabnzbd.initialize(pause, clean_up, evalSched=True, repair=repair)
File "/usr/share/sabnzbdplus/sabnzbd/decorators.py", line 36, in call_func
return f(*args, **kw)
File "/usr/share/sabnzbdplus/sabnzbd/__init__.py", line 315, in initialize
rss.init()
File "/usr/share/sabnzbdplus/sabnzbd/rss.py", line 48, in init
__RSS = RSSQueue()
File "/usr/share/sabnzbdplus/sabnzbd/rss.py", line 209, in __init__
patch_feedparser()
File "/usr/share/sabnzbdplus/sabnzbd/rss.py", line 646, in patch_feedparser
feedparser._FeedParserMixin.namespaces["http://www.newznab.com/DTD/2010/feeds/attributes/"] = "newznab"
AttributeError: module 'feedparser' has no attribute '_FeedParserMixin'
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 153, in apport_excepthook
with os.fdopen(os.open(pr_filename,
FileNotFoundError: [Errno 2] No such file or directory: '/var/crash/_usr_bin_sabnzbdplus.1000.crash'

Original exception was:
Traceback (most recent call last):
File "/usr/bin/sabnzbdplus", line 1674, in <module>
main()
File "/usr/bin/sabnzbdplus", line 1180, in main
sabnzbd.initialize(pause, clean_up, evalSched=True, repair=repair)
File "/usr/share/sabnzbdplus/sabnzbd/decorators.py", line 36, in call_func
return f(*args, **kw)
File "/usr/share/sabnzbdplus/sabnzbd/__init__.py", line 315, in initialize
rss.init()
File "/usr/share/sabnzbdplus/sabnzbd/rss.py", line 48, in init
__RSS = RSSQueue()
File "/usr/share/sabnzbdplus/sabnzbd/rss.py", line 209, in __init__
patch_feedparser()
File "/usr/share/sabnzbdplus/sabnzbd/rss.py", line 646, in patch_feedparser
feedparser._FeedParserMixin.namespaces["http://www.newznab.com/DTD/2010/feeds/attributes/"] = "newznab"
AttributeError: module 'feedparser' has no attribute '_FeedParserMixin'

I have no idea what has changed. I'm running the latest Linux Mint, I tried uninstalling and reinstalling via apt-get and am faced with the same error.

Thank you in advance.

[safihre]

You are running 3.0.0, please install the latest version as this one is years old.
Since you mentioned apt, try this: https://sabnzbd.org/wiki/installation/i ... buntu-repo