Hello Takafumi,
The support available through this channel is in English.
Let's check whether AVG is causing the issue. Please disable AVG temporarily as mentioned here and check if you are able to access videos.
Could you let us know the website name you're trying to access? Did you try in alternate browsers and verify the status.
Please keep us updated on the progress.
AVG Internet security（AVG_IS)をインストールしてます。
AVG_ISのせいかどうかわかりませんが、あるサイトのLive映像を見ると1か月ほど前まで問題なく見れたLive映像が、Error＃2048が表示され見れません。
ちなみに、スマホをwifiにつなげて、Live映像を見ると見れますが、そのスマホをPC（モバイルホットスポット）を介してみると、見れなくなってしまいます。
それゆえ、PCの何かが理由（Error #2048)でLive映像が見れないと思われます。
AVG_ISが理由かわかりませんが、AVG_ISでLive映像がError＃2048で見れなくなる何等か設定が関与しているかご教示ください。
Hello Takafumi,
The support available through this channel is in English.
Let's check whether AVG is causing the issue. Please disable AVG temporarily as mentioned here and check if you are able to access videos.
Could you let us know the website name you're trying to access? Did you try in alternate browsers and verify the status.
Please keep us updated on the progress.