Issue importing articles

After minutes and 10*70 articles importes (more or less 75%) this issue appears:

Warning: set_time_limit() has been disabled for security reasons in ("mydir"/wp-content/plugins/fg-joomla-to-wordpress/admin/class-fg-joomla-to-wordpress-admin.php on line 220 Fatal error: Maximum execution time of 30 seconds exceeded in "mydir"/wp-includes/class-wp-image-editor-imagick.php on line 257

Then I stop the process. I wait some minutes and I restart the import process and this issue always appears and I cannot continue.

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