I hope you are well today and thank you for your question.
Please make sure that you have set the featured image to it as described on the below page.
If it still does not display for you then could you please share the page URL from your site where it is not displaying so that I can troubleshoot it?
Please try regenerating thumbnails on your site using the below plugin.
If the issue still exists then would you mind if I log in to your site and do quick troubleshooting? If this is ok then could you please temporarily create an admin user account and share me the account login details privately by adding them in the box having text “Enter your private content here (only you and forum moderators will be able to see it)”?
<div id=”tw-smenu” class=”tw-menu”><span style=”font-family: Consolas, Monaco, monospace;”>Hi,</span></div>
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<span lang="en"> I forwarded the username and password for you to verify the problem with the site.</span>
<p id=”tw-target-text” class=”tw-data-text tw-text-large XcVN5d tw-ta” dir=”ltr” data-placeholder=”Tradução”><span lang=”en”>Good morning people, </span></p>
<p class=”tw-data-text tw-text-large XcVN5d tw-ta” dir=”ltr” data-placeholder=”Tradução”><span lang=”en”>I forwarded my username and password by email to access the site https://somosplurall.com.br/. In the last few days, some images are broken and the plugin that was made available for the problem has not yet been installed. I request verification and thank you.</span></p>
You are using an older version of PHP on your website as shown in the attached screenshot so please update it to the latest version by contacting your web host.
Also, I visited the post on your website and saw you have either not set a featured image or it is corrupted as shown in the attached screenshot so could you please set it?