Uncaught TypeError in Loco_api_WordPressFileSystem::tryCredentials()

Hi, great plugin!

I noticed that for a while, whenever i tried to save a translation ( or creating a new po/mo ), i would get this error:

27-May-2019 11:23:17 UTC] PHP Fatal error: Uncaught TypeError: Argument 1 passed to Loco_api_WordPressFileSystem::tryCredentials() must be of the type array, boolean given, called in /path/to/loco-translate/src/api/WordPressFileSystem.php on line 244 and defined in /path/to/loco-translate/src/api/WordPressFileSystem.php:273

Versions:
Loco translate 2.2.2
WP 5.1.1
PHP 7.2.5

I know the error is probably due lack of permissions, but this way, it breaks before outputting the real error.

maybe replace it “$creds?$creds:array()” like you have in another call.