• もしあれば、画面に表示されたエラーメッセージをコピー&ペーストしてください

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• 何をしたいか、何をしたか、何が起きたかを説明してください

• あなたのブラウザは何ですか?

• あなたの言語の代わりに、表示されている英語の文章をコピー&ペーストしてください。 このバグのスクリーンショットをお持ちの場合は、お好みの画像ホスティングサービス(例えば、 snipboard.io　など）をご利用し、コピー&ペーストしたリンクをここに書き込んでください。 このテキストは翻訳ページで翻訳可能になっていますか?もしそうならば、24時間以上前に翻訳されていますか?

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• あなたのブラウザは何ですか?

• 何を意味するのか、簡単に理解できるようにあなたの提案を正確かつ簡潔に説明してください。

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• あなたのブラウザは何ですか?

• ブロックされたときの表示は何でしたか(空のスクリーン?一部のみのゲームインターフェイス?エラーメッセージ?)

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• あなたのブラウザは何ですか?

• BGAで正しく実装されていないルールはどの部分ですか?

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• ルールの間違いはゲームのリプレイで確認できますか?そうであれば、行動番号は何番ですか?

• あなたのブラウザは何ですか?

• やりたかったゲームアクションは何ですか?

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• このゲームアクションを引き起こす為に何を試みましたか?

• これを行おうとしたときに何が起こりましたか?(エラーメッセージ、ステータスバーメッセージ、他)

• あなたのブラウザは何ですか?

• どの段階でこの問題が起こりましたか?(画面の指示はどうなっていましたか)

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• ゲームアクションを行おうとしたとき、何が起こりましたか?(エラーメッセージ、ステータスバーメッセージ、他)

• あなたのブラウザは何ですか?

• 表示の問題を説明してください このバグのスクリーンショットをお持ちの場合は、お好みの画像ホスティングサービス(例えば、 snipboard.io　など）をご利用し、コピー&ペーストしたリンクをここに書き込んでください。

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• あなたのブラウザは何ですか?

• あなたの言語の代わりに、表示されている英語の文章をコピー&ペーストしてください。 このバグのスクリーンショットをお持ちの場合は、お好みの画像ホスティングサービス(例えば、 snipboard.io　など）をご利用し、コピー&ペーストしたリンクをここに書き込んでください。 このテキストは翻訳ページで翻訳可能になっていますか?もしそうならば、24時間以上前に翻訳されていますか?

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• あなたのブラウザは何ですか?

• 何を意味するのか、簡単に理解できるようにあなたの提案を正確かつ簡潔に説明してください。

The problem is that arena mode for 7WD is always without expansions because the Gurus witch are voting for it are the one playing without the expansion. And the way it is can never changer because expansion players can only become Guru by playing without expansion witch they obviously won't do.
That's a problem.
A LOT of player would love to play arena mode with both expansions (and top players in all time ranking are mostly playing with Agora et Pantheon), so there is two solutions :
-Alternate arena season from vanilla to both expansions.
-Create a second arena for 7WD with both expansion.

• あなたのブラウザは何ですか?