Hello,
After we updated Joomla from 3.8.5 to 3.8.6, we faced '500 internal server error' issues when accessed to PayPlans related menus ("Subscription details" menu, for example).
So we reverted it back to Joomla 3.8.5, then 500 internal server errors are gone.
However, we noticed that the menu title for "Subscription details" become blank when switched language to non-English.
On Joomla 3.8.3, everything was working fine.
Will you please check on your end too?
Thanks,
rikao