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On this page, you will find more information about the most common causes and most relevant solutions for the Line error 'Session protocol negotiation failure'. Do you need help straight away? Visit our support page.
Error information
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Category
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Error codeSession protocol negotiation failure
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ProductLine
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DeveloperLine
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Operating system-
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Platform-
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First seenSeptember 11, 2021
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VerifiedYes
What causes the Session protocol negotiation failure error?
The Line documentation indicates that error code 'Session protocol negotiation failure' is caused by the following problem: "Connected to the bot server, but protocol negotiation failed.".
Do you think there is another cause for this error? Let others know in the comments.
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