Remove “continue reading”

Hi, can you please help me to remove the “continue reading” on my post, please. I had tried a couple of ways found on the internet but none of them works.

BTW: I am not an expert at coding, so if is there any plugin that I can use that would be great, right now I am using the Post Grid plugin, and the result is the default “continue reading” link appears together with the Read More button from the plugin.

Please help me, thank you.

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