I can't upload my signature, please help!

[lukaXGAMErs]

I don't know why but when I about to upload the image, it'll always say "Unable to save image"

 

Even my older signature, I can't upload it at all! Please help me! I'm so frustrated right now! T^T

[Key]

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How are you trying to set the sig? Please upload the image on an image sharing site as

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,

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or

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and copy-paste the

[lukaXGAMErs]

I'll try to use that! Thank you very much Key-san!