I got this issue on my mobile and tablet (both running Ubuntu Touch). I upgraded to 0.51.2 this morning, but the problem persists. I have tried clearing browser cache as well as history, but it hasn’t helped. Everything looks fine in Firefox on Ubuntu though.
I get this error in the log after upgrading to 0.51.2: 2017-08-15 09:29:23 ERROR (MainThread) [aiohttp.server] Unhandled exception Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/aiohttp/web_protocol.py", line 434, in start yield from resp.prepare(request) File "/usr/lib/python3.6/site-packages/aiohttp/web_fileresponse.py", line 240, in prepare return (yield from self._sendfile(request, fobj, count)) File "/usr/lib/python3.6/site-packages/homeassistant/components/http/static.py", line 61, in sendfile yield from orig_sendfile(request, fobj, count) File "/usr/lib/python3.6/site-packages/aiohttp/web_fileresponse.py", line 121, in _sendfile_system writer = yield from self._sendfile_fallback(request, fobj, count) File "/usr/lib/python3.6/site-packages/aiohttp/web_fileresponse.py", line 149, in _sendfile_fallback yield from writer.write(chunk) File "/usr/lib/python3.6/site-packages/aiohttp/http_writer.py", line 295, in drain yield from self._stream.drain() File "/usr/lib/python3.6/site-packages/aiohttp/http_writer.py", line 128, in drain yield from self._protocol._drain_helper() File "/usr/lib/python3.6/asyncio/streams.py", line 211, in _drain_helper yield from waiter File "/usr/lib/python3.6/asyncio/futures.py", line 331, in __iter__ yield self # This tells Task to wait for completion. concurrent.futures._base.CancelledError
I just read back through and see you are having the problem with Chrome? I the current stable version of Chromium running on Ubuntu 16.04 and that works for both of my pi’s which running HASS AIO version. But when I try to use Firefox 55 (current stable release) I get a blank screen.