Fatal error on latest update

I’ve got the same error after latest update. My site is running on PHP v5.6.4 and I can’t upgrade it.
But looks like the issue is not with the PHP version.
As I found the problem is triggered by this function definition:

public function print() {
		$icon = sprintf(
			'<span class="dashicons dashicons-%s" aria-hidden="true"></span>',
			esc_attr( $this->icon() )
		);

		$title = sprintf(
			'<h3>%1$s %2$s</h3>',
			$icon,
			$this->title()
		);

		$content = $this->content();

		if ( is_array( $content ) ) {
			$content = implode( "\n\n", $content );
		}

		$content = wp_kses_post( $content );
		$content = wptexturize( $content );
		$content = convert_chars( $content );
		$content = wpautop( $content );

		echo "\n";
		echo '<div class="welcome-panel-column">';
		echo $title;
		echo $content;
		echo '</div>';
	}

in welcome-panel.php

Can you advice anything? Or may be it’s possible to do a downgrade to prev version of CF7 plugin? I would be great if you can give a link to prev version installation…

Try to check your admin email. There you can find a link to enter the admin area. Following it you’ll be able to disable CF7 plugin and restore normal admin area functions.

@ivaseg Sorry, just wanted to help. I’m not CF7 staff and waiting for bug fix too.