Error when I activate Learnpress

Hello,

As soon as I activate Learnpress, few things happen:

– This warning message above each blog post in the editor: https://imgur.com/1KNj1BL

Warning: Declaration of RWMB_Meta_Box_Tabs_Field::html() should be compatible with RWMB_Field::html($meta, $field) in /home/hetnlpco/public_html/wp-content/plugins/learnpress/inc/admin/meta-boxes/class-meta-box-tabs.php on line 13

– Also my frontpage shows 5 of my blogposts completely, in stead of showing my actual homepage.

It used to work properly, but today suddenly this happened after I decided to continue working on a blog post.

I turned off Learnpress now.

What should I do to fix this and be able to use Learnpress again?

Thank you