Graph detail not displaying

I am having some problems with viewing graphs.

I can see my overall graph like this:

But when I click into it for more detail I get:

Not sure if it is a rights issue, or something else. I am not a Linux guru. Here is a copy of my validate.php output.

Component Version
LibreNMS 1.58.1-4-g175516f5f
DB Schema 2019_04_22_220000_update_route_table (147)
PHP 7.2.24-1+0~20191026.31+debian10~1.gbpbbacde
MySQL 10.3.18-MariaDB-0+deb10u1
RRDTool 1.7.1

[OK] Composer Version: 1.9.1
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[FAIL] The poller (LibreNMS) has not completed within the last 5 minutes, check the cron job.

I noticed the poller Fail. I am not sure if this is related or not, I was going to open a separate thread for this, once I got my current issue dealt with.

Thanks in advance for any assistance.

Facing the same issue. Were you able to solve it? If yes, what was the solution and the issue?