Can’t Get iMessage to work

Now i’ve tried every post and guide and youtube video about how to fix iMessages and Facetime but none of them work. I’ve tried 3 different accounts but to no avail. I have a USB wifi dongle but i connect my laptop to the internet through Ethernet while setting up iMessage and still the same.

Laptop Specs: Acer Aspire E5-476G-37MH Intel Core i3 - 7130u Intel HD 620 8GB DDR4 Mojave 10.14.6

submitted by /u/Bon_PH
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