Sonarr version (exact version): Not sure, last updated in early 2017 (January?)
Mono version (if Sonarr is not running on Windows): 220.127.116.11-8
OS: Synology DSM 6.1.3-15152-4
Description of issue: Installation has worked for years. Earlier this year, when loading the web GUI, I'm stuck at the "bouncing balls" screen. I see the white/grey bouncing balls, the text "Sonarr Ver." in the middle, and the Sonarr logo in the background. However, Sonarr is still working perfectly fine. It's downloading, renaming, moving just fine. I am able to interact with it (add series, search for episodes, check history, etc) via the nzb360 Android app through the API interface.
Is there something I can do to "reset" the web GUI? I can SSH into the NAS and poke around.