This happens when when generating the PHP code and there is key_value field type exists.
Notice: Array to string conversion in meta-box-builder/src/Encoders/Field.php on line 48
Call Stack
# Time Memory Function Location
1 0.0005 463880 {main}( ) .../post.php:0
2 0.2715 33194608 include( 'wp-admin/edit-form-advanced.php' ) .../post.php:198
3 0.2950 33767000 do_action( ) .../edit-form-advanced.php:570
4 0.2950 33773008 WP_Hook->do_action( ) .../plugin.php:478
5 0.2950 33773008 WP_Hook->apply_filters( ) .../class-wp-hook.php:312
6 0.2952 33774136 MBB\Edit->render( ) .../class-wp-hook.php:288
7 0.2953 33780160 require( 'meta-box-builder/views/tabs/code.php' ) .../Edit.php:27
8 0.2958 33825016 MBB\Encoders\MetaBox->encode( ) .../code.php:5
9 0.2958 33825320 MBB\Encoders\MetaBox->encode_fields( ) .../MetaBox.php:29
10 0.2958 33825696 array_walk ( ) .../MetaBox.php:41
11 0.2961 33840368 MBB\Encoders\MetaBox->encode_field( ) .../MetaBox.php:41
12 0.2961 33840480 MBB\Encoders\Field->encode( ) .../MetaBox.php:47
13 0.2961 33840880 array_walk ( ) .../Field.php:20
14 0.2961 33842072 MBB\Encoders\Field->make_translatable( ) .../Field.php:20
15 0.2961 33842072 sprintf ( ) .../Field.php:48
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