Authorize plugin page blank

When I go to general settings and try to authorize the plugin to work, I get my code from google and input the access code, I click save and it takes my to a blank screen on page admin.php?page=gadash_settings , It looks like it is not saving or something is going on. Can you let me know how I can fix this.

https://ww.wp.xz.cn/plugins/google-analytics-dashboard-for-wp/