Thank you for this question. Most of time we get this issue in file uploading. You can simply change the configuration in php.ini like below

    upload_max_filesize 64M
    post_max_size 64M
    max_execution_time 300
    max_input_time 300

Or you can simply set these values in .htaccess file like below

    # BEGIN WordPress
    
    RewriteEngine On
    RewriteBase /
    RewriteRule ^index\.php$ - [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /index.php [L]

    php_value upload_max_filesize 64M
    php_value post_max_size 64M
    php_value max_execution_time 300
    php_value max_input_time 300
    
    # END WordPress

Thanks for your question, its a memory issue. You can paste the below code into your .htaccess file.

php_value upload_max_filesize 64M php_value post_max_size 64M php_value max_execution_time 300 php_value max_input_time 300

You can increase the uploading size according to your need.

Hi Alexander

Please open the Post or Product again and then retry upload image it will work, even then also not solve problem, then finally disable imagemagick from php.ini and If you dont know how to do this, then You can take support from your Host Provider.

Thanks