Error when I try to sign : Internal Error: Please contact your administrator

[Iwios]

Describe the bug
When I try to sign a pdf, I put my password, and after click en sign, I have this message error:
Internal error: Please contact your administrator

To Reproduce
Steps to reproduce the behavior:

• I'm an authenticated user
• Upload a file
• Click on 'Open in Libresign'
• Click on the username of user need to sign
• Put the frame where the sign does appear
• Log with the user sign, clink on sign
• Put your password
• Click on sign
• See the error message on top right

Environment information (please complete the following information):

• OS: Debian 11
• Browser Firefox
• LibreSign Version 6.3.0
• Nextcloud Server Version 25.0.3

Error message:

[{"file":"\/var/www/html/apps\/libresign\/vendor\/tecnickcom\/tcpdf\/tcpdf.php","line":6412,"function":"max"},{"file":"\/var/www/html/apps\/libresign\/lib\/Handler\/Pkcs12Handler.php","line":194,"function":"Write","class":"TCPDF","type":"->"},{"file":"\/var/www/html/apps\/libresign\/lib\/Service\/SignFileService.php","line":800,"function":"writeFooter","class":"OCA\\Libresign\\Handler\\Pkcs12Handler","type":"->"},{"file":"\/var/www/html/apps\/libresign\/lib\/Service\/SignFileService.php","line":684,"function":"getPdfToSign","class":"OCA\\Libresign\\Service\\SignFileService","type":"->"},{"file":"\/var/www/html/apps\/libresign\/lib\/Service\/SignFileService.php","line":597,"function":"getFileToSing","class":"OCA\\Libresign\\Service\\SignFileService","type":"->"},{"file":"\/var/www/html/apps\/libresign\/lib\/Controller\/SignFileController.php","line":207,"function":"sign","class":"OCA\\Libresign\\Service\\SignFileService","type":"->"},{"file":"\/var/www/html/apps\/libresign\/lib\/Controller\/SignFileController.php","line":180,"function":"sign","class":"OCA\\Libresign\\Controller\\SignFileController","type":"->"},{"file":"\/var/www/html/lib\/private\/AppFramework\/Http\/Dispatcher.php","line":225,"function":"signUsingUuid","class":"OCA\\Libresign\\Controller\\SignFileController","type":"->"},{"file":"\/var/www/html/lib\/private\/AppFramework\/Http\/Dispatcher.php","line":133,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"\/var/www/html/lib\/private\/AppFramework\/App.php","line":172,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"\/var/www/html/lib\/private\/Route\/Router.php","line":298,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"\/var/www/html/lib\/base.php","line":1047,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"\/var/www/html/index.php","line":36,"function":"handleRequest","class":"OC","type":"::"}]

2nde error message:

max(): Argument #1 ($value) must contain at least one element

[Iwios]

After many search, this bug is from tcpdf.
An update have been develop but not push.

This is the link where I find the change:
tecnickcom/TCPDF@ab5fe4d

Sorry for the message with no link with LibreSign :)

[vitormattos]

Yes, this is from TCPDF.

Every time when you got an error log with TCPDF inside, is an error outside of LibreSign control.

Unfortunately we have this dependency to put the footer at all pages. I think that if you disable the feature to put the footer at PDF will work fine. This package is used by a lot of PHP projects but have problems with specific contents of PDF files.

[vitormattos]

Duplicated of #889