This page isn’t working. Error Too Many Redirects

Hello. I seem to be in a redirect loop?

This error (so far) only occurs when I’m in WordPress,
& navigate to: My Site > Plugins > Installed Plugins > WP Auction > Add An Auction;
(I can fill out the page, setting a starting price, start end date, payment, etc.)
When I go to submit the auction, the page is reloaded to this error page:

“This page isn’t working

(domain name) redirected you too many times.

Try clearing your cookies.

ERR_TOO_MANY_REDIRECTS”

This doesn’t occur when I type my domain address into the URL and visit my site. No problems anywhere else (so far) only when in the above order, trying to add an auction.

It may be worth mentioning, that if I navigate to WordPress > My Site > Plugins > Installed Plugins > WP Auction,
Right above the landing tab, above General settings, is:”Cannot open: /wordpress/core/5.0.3/wp-content/plugins/wp-auctions/styles/ ”

I’m by no means an expert and this has been a huge learning curve for me, I’m not even sure if I’m taking the right steps.

But here’s what I’ve tried :
Contacting WordPress support via live chat,
agent said she “cleared cache” on WP’s end, & I was directed to forums of this plugin.
Clearing cache & cookies (chrome)
Deleting cookies manually/one-by-one
Surfing incognito
Using Firefox, which did not even load at all, it was just stuck sending the data, “Waiting for wordpress.com | Waiting for (domain name).com”
Checked Settings to make sure the SIte address (URL) & WordPress Adress (URL) were both correct and the same, https:// in order.
Deactivating plugin, and reactivating
Deactivating ALL plugins and reactivating
Using an online redirect mapper, no errors, final status code 200
Redirect checker
SSL Server Test
Flushing DNS

Would appreciate any suggestions,
thanks.