Topic Tag: Setting up custom fields

Problem:
Fatal error: Call to undefined function mb_strtolower()

Solution:
The multibyte string extension (mbstring) is required for Toolset.

You need to enable mbstring on your server. Please contact your hosting authorities and ask them to enable this extension. To solve this issue you need to install this extension on your server:
=> http://www.php.net/manual/en/mbstring.installation.php

You can find the proposed solution, in this case with the following reply:
=> https://toolset.com/forums/topic/choose-from-previously-created-fields-does-not-work/#post-1619691

Relevant Documentation:
=> https://toolset.com/toolset-requirements/

Problem:
Google Site Kit plugin crashes Toolset Settings page

Solution:
The issue is fixed with the Views 3.2 and Blocks 1.2

Relevant Documentation:

Problem:

How should I go about changing the radio to multi select checkboxes without losing current data and maintaining the copy function between post types?

Solution:

There aren't such kind of built-in feature within Toolset plugins, both your requests need custom codes:

https://toolset.com/forums/topic/change-radio-button-to-multi-select-checkboxes-without-losing-current-data/#post-1607929

Relevant Documentation: