Problem with Arcadia Theme after installation

Hi,
I recently installed a new theme in WordPress.
After installation I activated the theme and I started to try it, but I quickly encountered problems.
Within the section where I can leave a comment gives me these 2 errors:

Warning: Illegal string offset ‘portfolio_type’ in / home / levieenr / public_html / wp-content / themes / arcadia / functions.php on line 97

Warning: Illegal string offset ‘arcadia_portfolio_layout’ in / home / levieenr / public_html / wp-content / themes / arcadia / functions.php on line 140

Can you tell me how to fix these errors?

Thank you.

Site – http://www.levieerouge.com