I'm seeing the same error

Warning: count(): Parameter must be an array or an object that implements Countable in .../extensions/PageSchemas/includes/PageSchemas.classes.php on line 235

MediaWiki 1.32.0
PHP 7.2.19 (cgi-fcgi)
MySQL 5.6.44-86.0
PageSchemas 0.4.9

@Yaron_Koren FYI Not sure if you get to see this by default.

@Kghbln - thanks for including me; no, I didn't see this before. I just checked in what I think is a fix for this.

@Yaron_Koren You are welcome. I just checked out master but the issue still persists.

I'm also getting the same error with a new install of 0.4.9
Seems to be when I try and add a section.

Line 263:

if ( count( $returnVals ) != 2 ) {
    continue;
}

Likewise I still see the same.