ZC 1.5.8
PHP 8.0

I'm getting the following warning when downloading a digital product via the download now button when viewing the order. Everything is processed as it should.

Code:
Request URI: /index.php?main_page=download&order=72&id=68, IP address: X.X.X.X
#1 zcObserverDownloadsViaUrl->updateNotifyCheckDownloadHandler() called at [/includes/classes/traits/NotifierManager.php:87]
#2 base->notify() called at [/includes/modules/pages/download/header_php.php:89]
#3 require(/includes/modules/pages/download/header_php.php) called at [/index.php:35]
--> PHP Warning: Trying to access array offset on value of type bool in /includes/classes/observers/auto.downloads_via_url.php on line 93.

Request URI: /index.php?main_page=download&order=72&id=68, IP address: X.X.X.X
#1 zcObserverDownloadsViaUrl->updateNotifyCheckDownloadHandler() called at [/includes/classes/traits/NotifierManager.php:87]
#2 base->notify() called at [/includes/modules/pages/download/header_php.php:89]
#3 require(/includes/modules/pages/download/header_php.php) called at [/index.php:35]
--> PHP Warning: Trying to access array offset on value of type bool in /includes/classes/observers/auto.downloads_via_url.php on line 93.

Request URI: /index.php?main_page=download&order=72&id=68, IP address: X.X.X.X
#1 zcObserverDownloadsViaUrl->updateNotifyDownloadReadyToStart() called at [/includes/classes/traits/NotifierManager.php:87]
#2 base->notify() called at [/includes/modules/pages/download/header_php.php:148]
#3 require(/includes/modules/pages/download/header_php.php) called at [/index.php:35]
--> PHP Warning: Trying to access array offset on value of type bool in /includes/classes/observers/auto.downloads_via_url.php on line 122.

Request URI: /index.php?main_page=download&order=72&id=68, IP address: X.X.X.X
#1 zcObserverDownloadsViaUrl->updateNotifyDownloadReadyToStart() called at [/includes/classes/traits/NotifierManager.php:87]
#2 base->notify() called at [/includes/modules/pages/download/header_php.php:148]
#3 require(/includes/modules/pages/download/header_php.php) called at [/index.php:35]
--> PHP Warning: Trying to access array offset on value of type bool in /includes/classes/observers/auto.downloads_via_url.php on line 122.