Scheduling - Automatic Reminders

I enabled both invoice reminders and bill reminders and did not change the default settings. Based on what I understand from this setting is that

1) The customer receives an email one day after the due date, as well as 3 days, 5 days and 10 days if the invoice has bot been paid during that time-frame.

2) Admin receives an email 10 days prior to when a bill is due as well as 5 days, three days and 1 day if the bill has not been marked as paid during that time frame.

I added cron to my server to activate the above reminder emails.

No emails are received by the customer for late payment reminders and no emails are received for bill payment reminders.

Cron is set as follows: * 9 * * . I removed the >> /dev/null from the cron call and added my email address.

An email is received every minute between 9 and 10 am. The content of the email is as follows (domain name replaced with xxxxx)

In UrlGenerator.php line 120:

Argument 2 passed to Illuminate\Routing\UrlGenerator::__construct() must be
an instance of Illuminate\Http\Request, null given, called in /home/xxxxxx/public_html/vendor/laravel/framework/src/Illuminate/Routing/RoutingServ
iceProvider.php on line 65

I am at a loss on how to correct this. Anybody available to give me a pointer ?

I found the solution here:

https://akaunting.com/forum/discussion/general/recurring-invoice-cron-not-working?page=3