Cannot import feed items

I’ve made lots of recent changes to my site, and at some point WP RSS Aggregator stopped importing feed items. There were 800 items but they were dated by two weeks.

Updates stopped on 1/12/17.

I subsequently checked the WP Cron and logs (set to info level) and found nothing useful or errant (no useful error messages and no stuck wordpress cron). The machine can fetch the feed documents from the command line (with wget) but refuses to import items.

I tried erasing all items and reimporting, and just ended up with empty feed sources (now no items instead of old items).

I also tried adding new feed sources, those also refuse to import.

I think this problem possibly correlates with me changing my site url from http://ng.domain.com/ to https://www.domain.com/. I don’t think there are conflicting plugins or themes but now the site is in production and I am hesitant to dump them to test.

The GUID on old feed sources is “wrong” but I was under the impression I should not edit these. Also, the new feed sources would have a new correct GUID which does not work.

Any thoughts?

I am posting relevant logs and information below:

### Begin System Info ###

## Please include this information when posting support requests ##

Multi-site: Yes

SITE_URL: https://www.kplat.com
HOME_URL: https://www.kplat.com

Plugin Version: 4.10
WordPress Version: 4.7.1

Platform: Apple
Browser Name: Safari
Browser Version: 10.0.2
User Agent String: Mozilla/5.0 (Macintosh; Intel Ma
c OS X 10_12_2) AppleWebKit/602.
3.12 (KHTML, like Gecko) Version
/10.0.2 Safari/602.3.12

PHP Version: 7.0.13-0ubuntu0.16.04.1
MySQL Version: 5.7.16-0ubuntu0.16.04.1 (mysqli)
Web Server Info: Apache/2.4.18 (Ubuntu)

PHP Safe Mode: No
PHP Memory Limit: 256M
PHP Post Max Size: 8M
PHP Time Limit: 30

WP_DEBUG: Disabled

WP Table Prefix: Length: 5 Status: Acceptable

Show On Front: page
Page On Front: Professional Services #5
Page For Posts: Professional Services #5

Session: Disabled
Session Name: PHPSESSID
Cookie Path: /
Save Path: /var/lib/php/sessions
Use Cookies: On
Use Only Cookies: On

UPLOAD_MAX_FILESIZE: 2MB
POST_MAX_SIZE: 8MB
WordPress Memory Limit: 64MB
DISPLAY ERRORS: N/A
FSOCKOPEN: Your server supports fsockopen.

ACTIVE PLUGINS:

404page – your smart custom 404 error page: 2.3
Contact Form 7: 4.6
Head & Footer Code: 1.0.7
jQuery UI Widgets: 0.38
Max Mega Menu: 2.3.4
Page Builder by SiteOrigin: 2.4.21
SiteOrigin CSS: 1.1.2
SiteOrigin Premium: 1.0.3
SiteOrigin Widgets Bundle: 1.7.2
WP RSS Aggregator: 4.10
WP SES: 0.4.9

NETWORK ACTIVE PLUGINS:

WordPress MU Domain Mapping: 0.5.5.1
WP Crontrol: 1.4

CURRENT THEME:

SiteOrigin North: 1.2.9

### End System Info ###

[23-01-2017 17:43:30] [Info] WPRSS > wprss_fetch_insert_single_feed_items:
Starting import of feed: 1600

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Force feed flag removed

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Start of import time updated: 2017-01-23 17:43:30

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Original feed source URL: https://www.theregister.co.uk/headlines.atom

[23-01-2017 17:43:30] [Info] WPRSS > wprss_fetch_insert_single_feed_items:
Actual feed source URL: https://www.theregister.co.uk/headlines.atom

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Feed limit value is:

[23-01-2017 17:43:30] [Info] WPRSS > wprss_fetch_insert_single_feed_items:
Feed import limit: 20

[23-01-2017 17:43:30] [Info] WPRSS > wprss_fetch_insert_single_feed_items:
Feed URL is valid: https://www.theregister.co.uk/headlines.atom

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Sliced a segment of items: 0

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Retrieved existing permalinks: 0

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Items to import remained untouched. Not items already exist or are blacklisted.

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Some items may be deleted due to limit: 20

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
There already are 0 items in the database. 20 items can be inserted. 0 items will be deleted

[23-01-2017 17:43:30] [System] WPRSS > wprss_fetch_insert_single_feed_items:
Last import time updated: 1485193410

[23-01-2017 17:43:30] [Info] WPRSS > wprss_fetch_insert_single_feed_items:
Import complete: 1600