2.1.9 and blank page because php errors?

Hello

Tried to activate All-in-One Event Calendar 2.1.9 to try and get blank page.
Read and tried ALL possible solutions found in this forum but nothing helped.

Deactivated the plug-in thru ftp but still want to try it out.
Please help.

the PHP errors:

[Tue Feb 03 15:54:32 2015] [error] [client **.***.*.***] All-in-One Event Calendar: mkdir(): Permission denied @ /var/www/htdocs/beeldenstorm/public/web/wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php:1243 #2, referer: http://beeldenstorm.be/web/wp-*****/network/sites.php

[Tue Feb 03 15:54:32 2015] [error] [client **.***.*.***] PHP Fatal error: Call to a member function render() on a non-object in /var/www/htdocs/beeldenstorm/public/web/wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php on line 300, referer: http://beeldenstorm.be/web/wp-*****/network/sites.php

https://ww.wp.xz.cn/plugins/all-in-one-event-calendar/