Illegal string offset warnings

Hi,

I saw this issue was marked as resolved: https://wordpress.org/support/topic/warning-illegal-string-offset-twitterimage

However we’re using 7.4.0 and we’re still getting these warnings in the logs:

PHP Warning:  Illegal string offset 'twitterCardType' in /....../plugins/jm-twitter-cards/classes/admin/options.php on line 70
PHP Warning:  Illegal string offset 'twitterCreator' in /....../plugins/jm-twitter-cards/classes/admin/options.php on line 84
PHP Warning:  Illegal string offset 'twitterCreator' in /....../plugins/jm-twitter-cards/classes/admin/options.php on line 93
PHP Warning:  Illegal string offset 'twitterCardOg' in /....../plugins/jm-twitter-cards/classes/markup.php on line 82
PHP Warning:  Illegal string offset 'twitterSite' in /....../plugins/jm-twitter-cards/classes/admin/options.php on line 105
PHP Warning:  Illegal string offset 'twitterCardOg' in /....../plugins/jm-twitter-cards/classes/markup.php on line 82
PHP Warning:  Illegal string offset 'twitterCardOg' in /....../plugins/jm-twitter-cards/classes/markup.php on line 82
PHP Warning:  Illegal string offset 'twitterPostPageDesc' in /....../plugins/jm-twitter-cards/classes/admin/options.php on line 139
PHP Warning:  Illegal string offset 'twitterImage' in /....../plugins/jm-twitter-cards/classes/admin/options.php on line 166
PHP Warning:  Illegal string offset 'twitterImage' in /....../plugins/jm-twitter-cards/classes/admin/options.php on line 177

Thanks,

Tom

https://wordpress.org/plugins/jm-twitter-cards/