Both I and my sister encountered this problem and I figured it’s worth sharing here: the applications seem to silently fail when it decides that the SSL certifications are wrong or don’t match the previous one seen. Simply go to Preferences, uncheck SSL, and reconnect. You should then be given an SSL warning and given the opportunity to accept or reject the new certification. After accepting it you should be connected. Finally, disconnect, enable SSL again, and the reconnect to be back with everything working.