Unable to trade due to "different protocol version"

I want to perform a trade but when i click on the trade i get a message that either I or the other person is using a “different protocol version”. I believe i have th elatest version installed v0. if I have the latest version is there a way to tell the other trader to update their software. Is there somethign else i am doing wrong? This is my first trade on bitsquare.

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The latest version is v0.