If someone recently registers for a new wordpress account, and then goes to the forum page, they see a whole bunch of these errors:

Warning: Illegal string offset 'topics' in /srv/users/serverpilot/apps/culturedfoodlife/public/wp-content/plugins/simple-press/forum/content/classes/sp-list-topic-class.php on line 337

Warning: in_array() expects parameter 2 to be array, string given in /srv/users/serverpilot/apps/culturedfoodlife/public/wp-content/plugins/simple-press/forum/content/classes/sp-list-topic-class.php on line 337

The errors are repeated over and over. 

I've noticed that the error will fix itself for that user the next day, but I can't just tell people to wait a day. I also noticed that I can fix it manually for a user by going into the database, into the "wp_sfmembers" table, searching for their user ID, and edit the "checktime" field to a time at least 12 hours (or more) in the past. I don't know why changing this time fixes the issue, nor why the issue is even occurring in the first place. To reproduce the issue:

Go to https://www.culturedfoodlife.c.....y-account/ and create an account (right side of screen)

Then go to https://www.culturedfoodlife.c.....ers/forum/ and you will see the errors. 

Please help!