Warning: fopen(logfile.txt): failed to open stream: Permission denied in /var/www/html/joaquin/callpicker_workflows/libs/logfile.php on line 79

Call Stack:
    0.0016     652896   1. {main}() /var/www/html/joaquin/callpicker_workflows/callpicker_to_zendesk.php:0
    0.0042     971880   2. CallpickerIntegrationsUtils->__construct() /var/www/html/joaquin/callpicker_workflows/callpicker_to_zendesk.php:8
    0.0043     973120   3. logfile->lwrite() /var/www/html/joaquin/callpicker_workflows/libs/callpicker_integrations_utils.php:59
    0.0043     973120   4. logfile->lopen() /var/www/html/joaquin/callpicker_workflows/libs/logfile.php:21
    0.0043     973408   5. fopen() /var/www/html/joaquin/callpicker_workflows/libs/logfile.php:79

Can't open logfile.txt!
Warning: fclose() expects parameter 1 to be resource, boolean given in /var/www/html/joaquin/callpicker_workflows/libs/logfile.php on line 57

Call Stack:
    0.0016     652896   1. {main}() /var/www/html/joaquin/callpicker_workflows/callpicker_to_zendesk.php:0
    0.0042     971880   2. CallpickerIntegrationsUtils->__construct() /var/www/html/joaquin/callpicker_workflows/callpicker_to_zendesk.php:8
    0.0043     973120   3. logfile->lwrite() /var/www/html/joaquin/callpicker_workflows/libs/callpicker_integrations_utils.php:59
    0.0043     973120   4. logfile->lopen() /var/www/html/joaquin/callpicker_workflows/libs/logfile.php:21
    0.0061     973480   5. CallpickerIntegrationsUtils->__destruct() /var/www/html/joaquin/callpicker_workflows/libs/callpicker_integrations_utils.php:0
    0.0061     973480   6. logfile->lclose() /var/www/html/joaquin/callpicker_workflows/libs/callpicker_integrations_utils.php:638
    0.0061     973536   7. fclose() /var/www/html/joaquin/callpicker_workflows/libs/logfile.php:57