Memory issue

Hi, after installing mailpoet on a new build, I`m getting this error message;
” Deprecated: strip_tags(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/0/1186231/www/wp-admin/admin-header.php on line 36

 and this is the message I get on the frontend; (only homepage)

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/0/1186231/www/wp-content/plugins/woocommerce/includes/wccom-site/rest-api/class-wc-rest-wccom-site-installer-error-codes.php on line 1

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 65536 bytes) in /var/www/0/1186231/www/wp-content/plugins/woocommerce/includes/data-stores/class-wc-customer-data-store-session.php on line 84″
When I deactivate mailpoet, the error is gone, and all works well. I also tried bumping the memory resource on the hosting from 1GB to 4GB, but no help

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