@Starker3 Do you know if the data that would be included in the report might contain some special unicode characters, like emojis or similar?

I'll check with the user @sgiehl

We have the same error when generating PDF-Reports, and only then:

ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] Uncaught exception: TypeError: array_map(): Argument #2 ($array) must be of type array, bool given in /var/www/html/vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php:2004
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] Stack trace:
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #0 /var/www/html/vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php(2004): array_map(Array, false)
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #1 /var/www/html/vendor/tecnickcom/tcpdf/tcpdf.php(5308): TCPDF_FONTS::UTF8StringToArray('Handlungsleitfa...', true, Array)
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #2 /var/www/html/vendor/tecnickcom/tcpdf/tcpdf.php(5114): TCPDF->getCellCode(100, 6, 'Handlungsleitfa...', 'LR', 0, 'L', true, false, 0, true, 'T', 'M')
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #3 /var/www/html/core/ReportRenderer/Pdf.php(380): TCPDF->Cell(100, 6, 'Handlungsleitfa...', 'LR', 0, 'L', true, false)
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #4 /var/www/html/core/ReportRenderer/Pdf.php(333): Piwik\ReportRenderer\Pdf->paintReportTable()
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #5 [internal function]: Piwik\ReportRenderer\Pdf->renderReport(Array, 20)
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #6 /var/www/html/plugins/ScheduledReports/API.php(540): array_walk(Array, Array)
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #7 [internal function]: Piwik\Plugins\ScheduledReports\API->generateReport('5', 'today', 'de', '3', 'day', 'pdf', false)
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #8 /var/www/html/core/API/Proxy.php(244): call_user_func_array(Array, Array)
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC] [93925] #9 /var/www/html/core/Context.php(28): Piwik\API\Proxy->Piwik\API\{closure}()
ERROR Piwik\FrontController[2022-01-10 07:05:28 UTC]

We are using the official docker-image (Apache) version 4.6.2. It is quite likely that unicode charachters are involved. The string in question is most likely Handlungsleitfaden_Umgang mit Corona-Verdachtsfällen.

If you need any more information, please do not hesitate to ask.

This might be related to tecnickcom/TCPDF#464.

We have the same issue in production. Below stack trace:

I see there is a UTF8StringToArray('MyTest dispon...', . I find 3 related action names in the log_action table, they contain below characters, not sure if this causes an issue?

• Test-Matomo
•  - Test - 
• Test d'aMatomo -

ERROR [2022-01-10 22:07:36] 15766 Uncaught exception: TypeError: array_map(): Argument #2 ($array) must be of type array, bool given in vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php:2004
Stack trace:
#0 vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php(2004): array_map(Array, false)
#1 vendor/tecnickcom/tcpdf/tcpdf.php(5308): TCPDF_FONTS::UTF8StringToArray('MyTest dispon...', true, Array)
#2 vendor/tecnickcom/tcpdf/tcpdf.php(5114): TCPDF->getCellCode(100, 6, 'Services dispon...', 'LR', 0, 'L', true, false, 0, true, 'T', 'M')
#3 core/ReportRenderer/Pdf.php(380): TCPDF->Cell(100, 6, 'Services dispon...', 'LR', 0, 'L', true, false)
#4 core/ReportRenderer/Pdf.php(333): Piwik\ReportRenderer\Pdf->paintReportTable()
#5 [internal function]: Piwik\ReportRenderer\Pdf->renderReport(Array, 5)
#6 plugins/ScheduledReports/API.php(540): array_walk(Array, Array)
#7 plugins/ScheduledReports/API.php(608): Piwik\Plugins\ScheduledReports\API->generateReport('5', '2022-01-03', 'fr', 2, 'week')
#8 core/Context.php(75): Piwik\Plugins\ScheduledReports\API->Piwik\Plugins\ScheduledReports{closure}()
#9 plugins/ScheduledReports/API.php(679): Piwik\Context::changeIdSite('5', Object(Closure))
#10 [internal function]: Piwik\Plugins\ScheduledReports\API->sendReport('5')
#11 core/Scheduler/Scheduler.php(276): call_user_func(Array, '5')
#12 core/Scheduler/Scheduler.php(148): Piwik\Scheduler\Scheduler->executeTask(Object(Piwik\Scheduler\Task))
#13 plugins/CoreAdminHome/API.php(69): Piwik\Scheduler\Scheduler->run()
#14 core/CronArchive.php(627): Piwik\Plugins\CoreAdminHome\API->runScheduledTasks()
#15 core/CronArchive.php(264): Piwik\CronArchive->runScheduledTasks()
#16 core/Access.php(661): Piwik\CronArchive->Piwik{closure}()
#17 core/CronArchive.php(269): Piwik\Access::doAsSuperUser(Object(Closure))
#18 plugins/CoreConsole/Commands/CoreArchiver.php(32): Piwik\CronArchive->main()
#19 vendor/symfony/console/Symfony/Component/Console/Command/Command.php(257): Piwik\Plugins\CoreConsole\Commands\CoreArchiver->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#20 vendor/symfony/console/Symfony/Component/Console/Application.php(874): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#21 vendor/symfony/console/Symfony/Component/Console/Application.php(195): Symfony\Component\Console\Application->doRunCommand(Object(Piwik\Plugins\CoreConsole\Commands\CoreArchiver), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#22 [internal function]: Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#23 core/Console.php(130): call_user_func(Array, Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#24 core/Access.php(670): Piwik\Console->Piwik{closure}()
#25 core/Console.php(131): Piwik\Access::doAsSuperUser(Object(Closure))
#26 core/Console.php(82): Piwik\Console->doRunImpl(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#27 vendor/symfony/console/Symfony/Component/Console/Application.php(126): Piwik\Console->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#28 console(32): Symfony\Component\Console\Application->run()
#29 {main}

FYI - Never got confirmation from the end-user if they had special unicode characters (Eg. Emoji, etc)

@tsteur just confirm the version number for TCPDF and PHP, they fix some issue, I think our issue is related to TCPDF_STATIC::pregSplit https://github.com/tecnickcom/TCPDF/blob/42cd0f9786af7e5db4fcedaa66f717b0d0032320/CHANGELOG.TXT#L20-L22

We're using the latest Matomo 4.6.2 and PHP 8. Not sure what version of TCPDF was included in 4.6.2 @peterhashair

@peterhashair @tsteur As mentioned above, this is most likely related to tecnickcom/TCPDF#464
Unless that gets fixed in TCPDF, I'm not sure if there is much we can do about that.

@sgiehl can we fork this repository and apply the fix or so? We have emails failing every day about this for few accounts meaning it's quite a big issue that scheduled reports aren't working

There is not yet a fix for that. But I can try to reproduce that locally tomorrow and see if I'm able to provide one. I guess simply suppressing the error might result in some missing text in the PDF. Also I wonder how that error actually occurs. It might mean that regex doesn't support unicode on that system maybe, or that the string contains a character that isn't valid unicode...

Turns our this was actually unrelated to TCPDF. Will propose a fix for that soon.