[TYPO3-calendar] Error using Reminder for events

[PM]

Hello

I am doing the following:

I add in the backend to an event a monitoring user.

Then an email is send to this user (event XY has ben changed).
BUT: This email ignors the settings:
plugin.tx_cal_controller.emailName = abcd
plugin.tx_cal_controller.emailAddress = cadf
plugin.tx_cal_controller.emailOrganisation = test

and uses some default (?) values.

Also in the log-files there are the following messages:

.		.		[5]		  !		[5_0]		Core: Error handler (BE): PHP Warning: 
strtolower() expects parameter 1 to be string, array given in 
/usr/local/typo3_src-4.5.22/typo3/contrib/swiftmailer/classes/Swift/Mime/SimpleHeaderSet.php 
line 381
.		.		.		  !		.		Core: Error handler (BE): PHP Warning: strtolower() 
expects parameter 1 to be string, array given in 
/usr/local/typo3_src-4.5.22/typo3/contrib/swiftmailer/classes/Swift/Mime/SimpleHeaderSet.php 
line 340
.		.		.		  !		.		Core: Error handler (BE): PHP Warning: strtolower() 
expects parameter 1 to be string, array given in 
/usr/local/typo3_src-4.5.22/typo3/contrib/swiftmailer/classes/Swift/Mime/SimpleHeaderSet.php 
line 336
.		.		.		  !		.		Core: Error handler (BE): PHP Warning: strtolower() 
expects parameter 1 to be string, array given in 
/usr/local/typo3_src-4.5.22/typo3/contrib/swiftmailer/classes/Swift/Mime/SimpleHeaderSet.php 
line 334


Any clue what is wrong in the configuration?

Thanks