PHP Warning: Invalid argument supplied – class-avia-type-fonts.php

Hi,
Anyone can help me to resolve issue below, we have recently change the site from http to https.
Error warning logs keep building up every time user access the site.
– We never use any custom font or uploaded any fonts.
– PHP running on 7.3, WordPress 5.4, Enfold version is 4.7.4

[Fri May 01 14:29:04.815323 2020] [php7:warn] [pid 24604] [client 192.1.1.28:62908] PHP Warning: array_keys() expects parameter 1 to be array, bool given in /var/www/html/wp-content/themes/enfold/framework/php/font-management/class-avia-type-fonts.php on line 856, referer: /wp-admin/admin.php?avia_welcome=true&page=avia
[Fri May 01 14:29:04.815367 2020] [php7:warn] [pid 24604] [client 192.1.1.28:62908] PHP Warning: sort() expects parameter 1 to be array, null given in /var/www/html/wp-content/themes/enfold/framework/php/font-management/class-avia-type-fonts.php on line 857, referer: /wp-admin/admin.php?avia_welcome=true&page=avia
[Fri May 01 14:29:04.815382 2020] [php7:warn] [pid 24604] [client 192.1.1.28:62908] PHP Warning: Invalid argument supplied for foreach() in /var/www/html/wp-content/themes/enfold/framework/php/font-management/class-avia-type-fonts.php on line 858, referer: /wp-admin/admin.php?avia_welcome=true&page=avia
[Fri May 01 14:29:04.943248 2020] [php7:warn] [pid 24604] [client 192.1.1.28:62908] PHP Warning: Invalid argument supplied for foreach() in /var/www/html/wp-content/themes/enfold/framework/php/font-management/class-avia-type-fonts.php on line 1086, referer: /wp-admin/admin.php?avia_welcome=true&page=avia