Anker PowerSolar 3-port 24W and Belkin Power Bank

I have a new Anker PowerSolar 3-port 24W and have tried to use a Belkin Power Bank 10000mAh 5v in and out. The PowerSolar doesn’t seem to work with it the red light comes on constant. Let it switch off and try again same thing. Would I be right to assume the two aren’t compatible?

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