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Just upgraded to MacOS 10.15 and can no longer print - "The Developer cannot be verified"

HP Recommended
Samsun Easy Printer Manager
macOS 10.15 Catalina

This is the MAC OS-message I get: "Samsung Easy Printer Manager cannot be opened because the developer cannot be verified"

I have tried to upgrade the Manager but on the HP/Samsung web site they only have versions supporting up to 10.13.

I guess I cannot be the only one with this problem (my printer is from 2015 and a Express SL-C1810W)

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