Avada Update to 6.2 fails

Today I updated my wordpress Avada theme to 6.2 and it fails. I got this message:

Fatal error: Uncaught Error: Call to a member function to_css() on null in /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php:174 Stack trace: #0 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php(69): Avada_Upgrade_620->migrate_load_more_options(Array) #1 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php(54): Avada_Upgrade_620->migrate_options() #2 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-abstract.php(74): Avada_Upgrade_620->migration_process() #3 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/class-avada-upgrade.php(169): Avada_Upgrade_Abstract->__construct() #4 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/class-avada-upgrade.php(219): Avada_Upgrade->_construct() #5 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/bootstrap.php(103): Avada_Upgrade::get in /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php on line 174

After a recovery I tried to install Avada from scratch activated the Thema and ended up in the same error code. How could I solve the issue?

I also updated the files via ftp and updated php to a actual version, but without success.

WordPress-Version 5.3.2
Aktuelles Theme: Avada (Version 6.2.0)
Aktuelles Plugin: (Version )
PHP-Version 7.3.11

Fehler-Details

Ein Fehler vom Typ E_ERROR wurde in der Zeile 174 der Datei /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php verursacht. Fehlermeldung: Uncaught Error: Call to a member function to_css() on null in /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php:174
Stack trace:
#0 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php(69): Avada_Upgrade_620->migrate_load_more_options(Array)
#1 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-620.php(54): Avada_Upgrade_620->migrate_options()
#2 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/upgrade/class-avada-upgrade-abstract.php(74): Avada_Upgrade_620->migration_process()
#3 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/class-avada-upgrade.php(169): Avada_Upgrade_Abstract->__construct()
#4 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/class-avada-upgrade.php(219): Avada_Upgrade->_construct()
#5 /home/.sites/907/site1793/web/cms/wp-content/themes/Avada/includes/bootstrap.php(103): Avada_Upgrade::get

Hi,

Contact with your purchase item author @ThemeFusion_Support @ThemeFusion hope they will help you out from your issue.

Or Helpful article about Avada theme update at themefusion documentation
https://theme-fusion.com/documentation/avada/install-update/how-to-update-theme/

Thanks!