Help me (Wordpress error)

Can anyone please help me.
I am trying to make my site first time using wordpress,i installed a wordpress theme called detube.
And i am getting this error when i clicked on my uploaded images on site.

Fatal error: Uncaught Error: [] operator not supported for strings in /home2/wafxmy0adsg4/public_html/wp-content/themes/detube/functions.php:791 Stack trace: #0 /home2/wafxmy0adsg4/public_html/wp-content/themes/detube/header.php(34): dp_meta_keywords() #1 /home2/wafxmy0adsg4/public_html/wp-includes/template.php(688): require_once('/home2/wafxmy0a...') #2 /home2/wafxmy0adsg4/public_html/wp-includes/template.php(647): load_template('/home2/wafxmy0a...', true) #3 /home2/wafxmy0adsg4/public_html/wp-includes/general-template.php(45): locate_template(Array, true) #4 /home2/wafxmy0adsg4/public_html/wp-content/themes/detube/single.php(29): get_header() #5 /home2/wafxmy0adsg4/public_html/wp-includes/template-loader.php(74): include('/home2/wafxmy0a...') #6 /home2/wafxmy0adsg4/public_html/wp-blog-header.php(19): require_once('/home2/wafxmy0a...') #7 /home2/wafxmy0adsg4/public_html/index.php(17): require('/home2/wafxmy0a...') #8 {main} thrown in /home2/wafxmy0adsg4/public_html/wp-content/themes/detube/functions.php on line 791

Before even editing any code I would try a different theme and see how that goes. I looked up detube and as far as I can tell it's old as fudge and not updated anymore.

See if you get any errors with the default WP theme.

try to change the theme and see if it fixed it. most time, some theme is not compatible

Default theme was working fine.
It maybe theme problem. Can you recommend a theme for photos and videos sharing.
Where i can easily place ads. I was using this theme because it was free.

Karan16 said:

Default theme was working fine.
It maybe theme problem. Can you recommend a theme for photos and videos sharing.
Where i can easily place ads. I was using this theme because it was free.

Click to expand...

https://wordpress.org/themes/

Try the Free themes here: https://mythemeshop.com/themes/

Use themes from the official wordpress repository , https://wordpress.org/themes/ , dont used nulled theme's they always have bad scripts in them .