Cron abnormally stopped

Hello
I'm running projeqtor 10.2.1

Since monday I'm getting alert emails 'Cron abnormally stopped'
I didn't change anything on my projeqtor environment, cron was running OK and then sudenly it's not OK .anymore

I restarted it manually sevaral time : no change. I rebooted the serveur : no change

See the detailled log in the attached file :   cron-stops-abnormaly.jpg

Regards

HELLO
I migrated to 10.2.3 and the cron is still stopping abnormaly
2023-03-15 13:15:25.722 ===== TRACE ===== Cron started at 15/03/2023 13:15:25
2023-03-15 13:15:26.124 ===== TRACE ===== Logfile->purge() : Technical trace to keep current log file
2023-03-15 13:15:26.211 ***** ERROR ***** [V10.2.3] ERROR *****
2023-03-15 13:15:26.211 ***** ERROR ***** [V10.2.3] on file '/var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php' at line (1530)
2023-03-15 13:15:26.211 ***** ERROR ***** [V10.2.3] cause = getimagesize(img/checkedOK.png): failed to open stream: No such file or directory
2023-03-15 13:15:26.211 ***** ERROR ***** [V10.2.3] getimagesize(img/checkedOK.png): failed to open stream: No such file or directory in Html2Pdf.php at line 1530
2023-03-15 13:15:26.211 ***** ERROR ***** [V10.2.3] Error while executing CRON script : fix the source issue and manually restart the CRON Process
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] EXCEPTION *****
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] on file '/var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php' at line (1536)
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] cause = Unable to get the size of the image [img/checkedOK.png]
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #0 /var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php (5786) -> _drawImage()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #1 /var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php (1456) -> _tag_open_IMG()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #2 /var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php (1424) -> _executeAction()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #3 /var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php (5606) -> _makeHTMLcode()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #4 /var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php (1456) -> _tag_open_TD()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #5 /var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php (1410) -> _executeAction()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #6 /var/www/html/projeqtor/external/html2pdf/src/Html2Pdf.php (612) -> _makeHTMLcode()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #7 /var/www/html/projeqtor/model/AutoSendReport.php (220) -> writeHTML()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #8 /var/www/html/projeqtor/model/Cron.php (566) -> sendReport()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => #9 /var/www/html/projeqtor/tool/cronRun.php (33) -> run()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] Unable to get the size of the image [img/checkedOK.png]
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] Exception while executing CRON script : fix the source issue and manually restart the CRON Process
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] === Trace Stack for last error ===
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => /var/www/html/projeqtor/tool/projeqtor.php at line 1541 calling debugPrintTraceStack()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] => calling exceptionHandler()
2023-03-15 13:15:26.213 ***** ERROR ***** [V10.2.3] ===
2023-03-15 13:15:30.276 ***** ERROR ***** [V10.2.3] CRON abnormally stopped
2023-03-15 13:15:30.276 ***** ERROR ***** [V10.2.3] === Trace Stack for last error ===
2023-03-15 13:15:30.276 ***** ERROR ***** [V10.2.3] => /var/www/html/projeqtor/model/Cron.php at line 308 calling debugPrintTraceStack()
2023-03-15 13:15:30.276 ***** ERROR ***** [V10.2.3] => /var/www/html/projeqtor/tool/cronRun.php at line 29 calling Cron:abort()
2023-03-15 13:15:30.276 ***** ERROR ***** [V10.2.3] => calling cronAbort()
2023-03-15 13:15:30.276 ***** ERROR ***** [V10.2.3] ===

Could you tell me how to "Disable the auto sending of report to unlock the Cron process." ??

I went into the scheduled report screen and deleted all the scheduled reports but the cron keeps on terninating abnormaly, so I guess there must be a paramater to change somewhere but I cannot find where

regards