[Support request] E-mail to download plugin Sorry, you are not allowed to access this page.

For the E-mail to download plugin I receive a “Sorry, you are not allowed to access this page.” error when attempting to delete a subscriber. Otherwise the plugin works fine.

Here is what I attempted to do to rectify the issue:
In my main development install:
1. deactivated all plugins but the ETD plugin (but did not delete all other plugins)
2. Went back to the 2017 theme
3. Updated to latest WordPress

In my main development install:
1. deactivated all plugins but the ETD plugin (but did not delete all other plugins)
2. Renamed my plugins folder to plugins.old
3. Made a new plugins folder
4. Reinstalled ETD
5. Went back to the 2017 theme
6. Updated to latest WordPress

Created a brand new install with latest WordPress:
1. Used 2017 theme
2. Only installed the ETD plugin

Created a brand new install with the last WordPress claimed to have worked fine with the ETD plugin (v 4.5.9 of WP if I recall):
1. Used 2017 theme
2. Only installed the ETD plugin

I also remotely (at my webhost) did the last 2 things as above.

Nothing worked; I received the same error.
Nothing worked to alleviate the error and I cannot delete subscribers.

Please advise.

Thanks in advance for your help!

-Joseph Levin