3 Problems Redux Framework 3.6.15 502 Bad Gateway +class-frontend.php on line

Redux Framework 3.6.15
if I turn off this plugin the page is otherwise error 502

And The SECOND PROBLEM:

Notice: wp_woocommerce_session_93e2e0dc39b8771202732dd51d4547d7 cookie cannot be set – headers already sent by /var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/wordpress-seo-premium/frontend/class-frontend.php on line 661 in /var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/wc-core-functions.php on line 832
Startseite
Kosmetik Shop

3rd Problem is:

<div class="product-element-top">
		<a href="https://cosmeticbag.de/kosmetik/advanced-bee-venom-duo-moisturiser/" class="product-image-link">
			<div class="product-labels labels-"><span class="onsale product-label">Sale</span><span class="attribute-label product-label label-term-skinchemists label-attribute-pa_brand">SKINCHEMISTS</span></div><br>
<b>Warning</b>:  Illegal string offset 'width' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'height' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'width' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'height' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'width' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'height' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<img width="1" height="1" src="https://cosmeticbag.de/wp-content/uploads/2018/09/6e202cbb-3d02-4013-891f-b0a3a95cf9ba.png" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="skinChemists Advanced Bee Venom Duo Feuchtigkeitscreme">		</a>
		<br>
<b>Warning</b>:  Illegal string offset 'width' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'height' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'width' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'height' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'width' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
<br>
<b>Warning</b>:  Illegal string offset 'height' in <b>/var/www/vhosts/cosmeticbag.de/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-regenerate-images.php</b> on line <b>222</b><br>
			<div class="hover-img">
				<a href="https://cosmeticbag.de/kosmetik/advanced-bee-venom-duo-moisturiser/">
					<img width="1" height="1" src="https://cosmeticbag.de/wp-content/uploads/2018/09/skinChemists-Advanced-Bee-Venom-Duo-Feuchtigkeitscreme.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="">				</a>
			</div>
				<div class="wrapp-swatches"></div>
					<div class="quick-shop-wrapper">
				<div class="quick-shop-close"><span>Close</span></div>
				<div class="quick-shop-form">
				</div>
			</div>
			</div>