Can someone support me?
my plan is valid... where is the support team?

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Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

I would like to support ...

After updating Joomla 3.8.1, the JoomSEF version:4.7.0 is displaying the following error in the frontend

Notice: Only variables should be assigned by reference in /home/streetst/public_html/components/com_sef/helpers/methods.php on line 68

how to solve?