Kibana stops displaying data at 12:00 AM every morning

Figured out what the issue is and there is something invalid with our custom time field. When I changed and index pattern in a lower environment to use the @timestamp kibana started displaying up to date date.

Now the issue is when I try and delete an existing index pattern in production I'm getting this error--

blocked by: [FORBIDDEN/8/index write (api)];: [cluster_block_exception] blocked by: [FORBIDDEN/8/index write (api)];

My research led to articles about not enough disk space or memory available on the machine to perform the write operation but we just added 1 TB to that machine so it's not that and the Elasticsearch is only using about 50% of the JVM Heap.

Also when I go to the Advanced Tab under Kibana and try to modify the settings I'm getting

Unable to update UI setting

Request failed with status code: 403

I reinstalled Kibana to no avail