Hi Salomonarazi,
Reload the paper and press your PIXMA MG3620s Black or Color button.
When you load the paper, insert the paper stack until the leading edge touches the far end of the front tray.
Once set, please attempt to print.
If the error persists, please contact one of Canon's Technical Support Representatives via phone or chat. To contact a Technical Support Representative, please use the link below to log into your My Canon account:
https://mycanon.usa.canon.com
Once logged in, click on your PIXMA MG3620 and then click on the Product Support button. When that page loads, click on either the Phone Support button or the Chat Support button to access support.
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