Web server not working

So, I did the HTTPS implementation for Windows seafile server, and it worked well for a while.

Now I get this

Page unavailable
Sorry, but the requested page is unavailable due to a server hiccup.
Our engineers have been notified, so check back later.

Since I am the engineer here, and I have no clue, maybe someone can give me a hint?
It might that the computer was restarted that made it stop working.
I think I have located some kind of issue in “K:\seafile-server\logs\seahub_django_request.log”

2017-11-12 14:18:45,819 [ERROR] django.request:256 handle_uncaught_exception Internal Server Error: /
Traceback (most recent call last):
File “C:\Users\salt\Documents\seafile-server-6.0.7\seahub\thirdpart\django-1.8.10-py2.7.egg\django\core\handlers\base.py”, line 108, in get_response
response = middleware_method(request)
File “C:\Users\salt\Documents\seafile-server-6.0.7\seahub\seahub\base\middleware.py”, line 66, in process_request
cur_note = cache.get(‘CUR_TOPINFO’) if cache.get(‘CUR_TOPINFO’) else
File “C:\Users\salt\Documents\seafile-server-6.0.7\seahub\thirdpart\django-1.8.10-py2.7.egg\django\core\cache\backends\filebased.py”, line 41, in get
if not self._is_expired(f):
File “C:\Users\salt\Documents\seafile-server-6.0.7\seahub\thirdpart\django-1.8.10-py2.7.egg\django\core\cache\backends\filebased.py”, line 138, in _is_expired
exp = pickle.load(f)

Any help is appreciated! //Niclas

So, I found a clue, as to clear the cache, and I did.
Stopped the service and removed all files in K:\seafile-server\seahub_cache
Started the service, and now I can access the web page again!