Error message when adding a new plugin

When I click to add a new plugin, I get error messages. I hope someone has seen this before and knows what the problem is. It’s a new website. I get the following error messages:

Warning: uasort() expects parameter 1 to be array, null given in /home/mydomain/public_html/wp-admin/includes/class-wp-plugin-install-list-table.php on line 204

Warning: number_format() expects parameter 1 to be double, string given in /home/mydomain/public_html/wp-includes/functions.php on line 174

Warning: number_format() expects parameter 1 to be double, string given in /home/mydomain/public_html/wp-includes/functions.php on line 174

Thank you

Paul