Getting white pages with several places - error tcpdf_colors.php

I'm getting white pages on several places.
I've turned error detection on so i can see why.

When i want to access the invoices, im getting this message:

Notice: Undefined index: None in /home/deb77304/domains/MYDOMAIN/public_html/components/com_eventbooking/tcpdf/include/tcpdf_colors.php on line 259

Fatal error: Allowed memory size of 100663296 bytes exhausted (tried to allocate 12288 bytes) in /home/deb77304/domains/MYDOMAIN/public_html/components/com_eventbooking/tcpdf/tcpdf.php on line 7288

After registration of a new member i'm also getting this error.

Hello Robby

The error message indicate that there is not enough memory to generate invoice/tickets PDF for the registration. Please contact your hosting provider, ask them to increase memory limit for your hosting account (maybe double the current value), then check it again. The error should be gone

Regards,

Tuan

I changed the memory limit from 96M tot 128M and the error is getting worse

Notice: Undefined index: None in /home/deb77304/domains/MYDOMAIN/public_html/components/com_eventbooking/tcpdf/include/tcpdf_colors.php on line 259

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 77773240 bytes) in /home/deb77304/domains/MYDOMAIN/public_html/components/com_eventbooking/tcpdf/tcpdf.php on line 7288

Changed to 256M and still the same:

Notice: Undefined index: None in /home/deb77304/domains/priodrive.be/public_html/components/com_eventbooking/tcpdf/include/tcpdf_colors.php on line 259

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 28672 bytes) in /home/deb77304/domains/priodrive.be/public_html/components/com_eventbooking/tcpdf/tcpdf.php on line 7308

Changed tot 512M and it works, but in my opinion pretty slow

Talking to myself, but i found the reason of all this: a 'simple' png file.
I've added a logo to the invoice but took the wrong file.
This file was 56MB and that's 'a bit' too much

Changed it to something much smaller, all problems are gone and it's going fast.

. Great. Thanks for letting us know the reason. I was going to ask you to submit a support ticket to see why the system requires much memory like that for generating invoice PDF. I'm glad you figured it out

Regards,

Tuan