Error on bottom of website when humming bird is enabled

Hello! For some reason I'm getting this error at the bottom of homepage when humming bird is activated:

Parse error: syntax error, unexpected T_FUNCTION in /home/content/62/7178962/html/test/wp-content/plugins/wp-hummingbird/core/modules/minify/class-jshrink-minifier.php on line 283

When I deactivate it it goes away.

Thanks in advance!