Cant play videos on youtube

i cant play some videos on youtube please help!!
this is what logfile says:-1:

osmc@osmc:~$ tail -f /home/osmc/.kodi/temp/kodi.log
json_script = function_cache.get (FunctionCache.ONE_DAY, self._load_json_script, self._java_script_url)
File “/home/osmc/.kodi/addons/plug”, l ine 101, in get
cached_data = partial_func()
File "/home/osmc/.kodi/addons/plug ", line 57, in _load_json_script
return self._load_java_script(ja va_script)
File "/home/osmc/.kodi/addons/plug ", line 62, in _load_java_script
raise Exception(‘Signature funct ion not found’)
Exception: Signature function not fo und
–>End of Python script error report ←
18:28:25.688 T:1925560832 ERROR: Playlist Player: skipping unplayable item: 0, path [plugin://]

Same for me for some - but seems like a known issue, Unable to play some videos since 3 days ago · Issue #285 · jdf76/ · GitHub

Should be “fixed” in Release 6.0.0 Test Releases · jdf76/ · GitHub and Release 5.5.1 · jdf76/ · GitHub