Javascript Error

1. Try disabling gzip in Ai1ec. You’ll find the setting in Dashboard->Events->Settings –> Advanced->Advanced Settings

2. You could be running low on PHP memory. I suggest using a plugin like WP-Memory-Usage to tell you your memory limits – as it’s a plugin, it will see exactly the same restrictions that Ai1ec will. This gives you a definitive answer as to whether any config changes (to give you a higher memory limit) have actually been picked up by PHP/Wordpress. See https://wordpress.org/plugins/wp-memory-usage/

Note: If you have a memory limit issue, it’s advisable once it’s fixed to go to Dashboard->Events->Theme Options and hit Save Options – This rebuilds the CSS, which previously may not have completed if it ran out of memory while performing the (initial) rebuild.