Unexpected data error

Hello,
I installed the plugin and when I display the page to manage themes or plugins I a have a list of messages :
InvalidArgumentException: Unexpected data in /srv/www/boutique-dermapure.dev/current/web/wp-content/plugins/loco-translate/src/data/Serializable.php on line 133
It seems to display one for each plugin / theme.

Here is the stack trace :
Loco_package_Theme::create( ) …/Bundle.php:100
16 Loco_package_Theme::createFromTheme( ) …/Theme.php:81
17 Loco_package_Bundle->configure( ) …/Theme.php:116
18 Loco_package_Bundle->configureDb( ) …/Bundle.php:532
19 Loco_package_Bundle->getCustomConfig( ) …/Bundle.php:419
20 Loco_data_Option->fetch( ) …/Bundle.php:543
21 Loco_data_Serializable->setUnserialized( ) …/Option.php:33

Does any body have an idea how to fix this?
If I deactivate the errors diplay it seems to save data but I prefer not have this errors.
Thank you.