import posts meta from Yoast doesn’t work

Hello,

I have some troubles importing Yoast post meta data to rank math…
the import fails.

i tried to delete and clean data then reinstall, but no changes

i am using last version of wp and rankmath.

Here is the log error messages

[25-Feb-2020 15:50:59 UTC] PHP Fatal error: Uncaught Error: Class ‘RankMath\Admin\Importers\Yoast_Blocks’ not found in /home/www/wp-content/plugins/seo-by-rank-math/includes/admin/importers/class-yoast.php:253
Stack trace:
#0 /home/www/wp-content/plugins/seo-by-rank-math/includes/admin/importers/abstract-importer.php(186): RankMath\Admin\Importers\Yoast->postmeta()
#1 /home/www/wp-content/plugins/seo-by-rank-math/includes/admin/importers/class-detector.php(66): RankMath\Admin\Importers\Plugin_Importer->run_import(‘postmeta’)
#2 /home/www/wp-content/plugins/seo-by-rank-math/includes/admin/importers/class-detector.php(88): RankMath\Admin\Importers\Detector->run(Object(RankMath\Admin\Importers\Yoast), ‘import’, ‘postmeta’)
#3 /home/www/wp-content/plugins/seo-by-rank-math/includes/admin/class-import-export.php(172): RankMath\Admin\Importers\Detector::run_by_slug(‘yoast’, ‘import’, ‘postmeta’)
#4 /home/www/wp-includes/class-wp-hook.p in /home/www/wp-content/plugins/seo-by-rank-math/includes/admin/importers/class-yoast.php on line 253

thanks for your help (if i can avoid re-typing all the meta for the website it would be great 😉