You can not upgrade to Akaunting 3.0 version

PHP is set to 7.3. When changing to PHP7.4 follwoing error shows so I can not upggrade to latest version, please help:

Call to undefined function App\Models\Document\bccomp() (View: /home/akount/public_html/resources/views/partials/documents/index/card-table-row.blade.php) (View: /home/akount/public_html/resources/views/partials/documents/index/card-table-row.blade.php) (View: /home/akount/public_html/resources/views/partials/documents/index/card-table-row.blade.php) (View: /home/akount/public_html/resources/views/partials/documents/index/card-table-row.blade.php)

If updating to PHP8.0 it does not allow to upgrade either, why?

Also, none of the APPs can be updadted too

Any clue?

You can not upgrade to Akaunting 3.0 version because your PHP version is lower than 8.0.2

Akkaunting actual version is 2.1.36

how to update akaunting from 2.1.36 to 3.0