ILIAS 9.7
Plugin Version 3.0.0

If a BBB room is created without a welcome text, there is an error (see screenshot). If the text is then added, there is a new error.

/var/www/ilias/Customising/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/vendor/bigbluebutton/bigbluebutton-api-php/src/Parameters/CreateMeetingParameters.php
Line 1395:
{{ ‘welcome’ => trim($this->welcomeMessage),}}
If you enter a text, the script terminates in the next line:
Line 1396:
{{ ‘moderatorOnlyMessage’ => trim($this->moderatorOnlyMessage),}}
Whoops
Exception
ErrorException (E_DEPRECATED)
trim(): Passing null to parameter 0000001 ($string) of type string is deprecated

Whoops\Exception\ErrorException thrown with message "trim(): Passing null to parameter #1 ($string) of type string is deprecated"

Stacktrace:
#12 Whoops\Exception\ErrorException in /var/www/ilias/Customizing/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/vendor/bigbluebutton/bigbluebutton-api-php/src/Parameters/CreateMeetingParameters.php:1395
#11 trim in /var/www/ilias/Customizing/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/vendor/bigbluebutton/bigbluebutton-api-php/src/Parameters/CreateMeetingParameters.php:1395
#10 BigBlueButton\Parameters\CreateMeetingParameters:getHTTPQuery in /var/www/ilias/Customizing/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/vendor/bigbluebutton/bigbluebutton-api-php/src/BigBlueButton.php:125
#9 BigBlueButton\BigBlueButton:getCreateMeetingUrl in /var/www/ilias/Customizing/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/vendor/bigbluebutton/bigbluebutton-api-php/src/BigBlueButton.php:137
#8 BigBlueButton\BigBlueButton:createMeeting in /var/www/ilias/Customizing/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/classes/class.ilBigBlueButtonProtocol.php:106
#7 ilBigBlueButtonProtocol:createMeeting in /var/www/ilias/Customizing/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/classes/class.ilObjBigBlueButtonGUI.php:493
#6 ilObjBigBlueButtonGUI:startClass in /var/www/ilias/Customizing/global/plugins/Services/Repository/RepositoryObject/BigBlueButton/classes/class.ilObjBigBlueButtonGUI.php:86
#5 ilObjBigBlueButtonGUI:performCommand in /var/www/ilias/Services/Repository/PluginSlot/class.ilObjectPluginGUI.php:174
#4 ilObjectPluginGUI:executeCommand in /var/www/ilias/Services/UICore/classes/class.ilCtrl.php:119
#3 ilCtrl:forwardCommand in /var/www/ilias/Services/Repository/PluginSlot/class.ilObjPluginDispatchGUI.php:61
#2 ilObjPluginDispatchGUI:executeCommand in /var/www/ilias/Services/UICore/classes/class.ilCtrl.php:119
#1 ilCtrl:forwardCommand in /var/www/ilias/Services/UICore/classes/class.ilCtrl.php:92
#0 ilCtrl:callBaseClass in /var/www/ilias/ilias.php:24