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I just had a rated OU battle in which my Stunfisk used yawn against a Mega Sceptile behind a substitute. The yawn failed. Yawns are not supposed to be stopped by substitute.
Okay, I'm a bit relieved. I'm having the same problem. Perhaps some maintenance is going on? At the time I posted my issue I didn't notice any identical problems. When the page refreshed upon my posting I saw yours.
Windows 7
Chrome
Firefox, problem persists.
Today
Eddy Metal
This error is giving me no message.
My problem is choosing my username. I click on the "choose username" button, type in my name, then again click choose name. Normally an additional box opens up for me to enter my password. Starting...