Updating WP to 5.4.1–nb_NO - theme error

Jannees

Hi

When updating WP, the site got blank and I received the error: 

PHP Fatal error: 
Uncaught Error: Call to undefined function mfn_user_os() in
/home/2/t/tibidrikk/www/wp-content/themes/betheme/header.php:15

Site url: https://tibidrikk.no/

Any help appreciated, thank you! 

Pablo

Hello,

Please switch theme to the default (twenty-twenty) and check, if the issue still exists.

Thanks

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Jannees

Hi

When I switch theme to twenty-twenty everything looks ok and as it should. 

Pablo

So, you updated the WP correctly?

Thanks

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Jannees

Yes

Jannees

I really need this fixed today, can you please help me. 

Pablo

Can you reinstall the BeTheme? Just remove the betheme folder from themes and install new one from the themeforest

It will not remove your theme options or content because it's stored in the database

Thanks

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Jannees

Hi, the site works ok now, thank you.