Error with ACF PRO

Hello, I can’t use ACF PRO with qTranslate-X.

I have this plugin installed:
ACF PRO version 5.2.3
qTranslate-X version 3.3
ACF qTranslate version 1.7.6

The problem incurred when using a repeater. When save post with a repeater field page returns follow error.
If I use ACF normal, not PRO, with the same other plugins, all work properly.

Anyone can help me?

Warning: Illegal string offset 'field_5548b2b971eab' in /Users/cr/wp-content/plugins/qtranslate-x/admin/qtx_configuration.php on line 37

Warning: Illegal string offset 'en' in /Users/rocco/Dropbox/cr/wp-content/plugins/qtranslate-x/admin/qtx_configuration.php on line 37

Warning: Illegal string offset 'it' in /Users/cr/wp-content/plugins/qtranslate-x/admin/qtx_configuration.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /Users/rocco/Dropbox/localhost/cinemaritrovato/wp-content/plugins/qtranslate-x/admin/qtx_configuration.php:37) in /Users/cr/wp-includes/pluggable.php on line 1196.

https://ww.wp.xz.cn/plugins/qtranslate-x/