Also getting the 502 error…

When attempting to use User Switching, I also receive a 502 Bad Gateway nginx error. I don’t receive the error anywhere else. I looked in my logs, and the specific error is:

17766#0: *201042 upstream sent too big header while reading response header from upstream

Some information about my install that might be relevant… This is a WordPress Multisite installation with subdomains. I redirect all traffic to https.

The URL that results in the 502 error is (I replaced my real domain with domain.com)

https://forms.domain.com/wp-login.php?action=switch_to_user&user_id=148&_wpnonce=4af0ef9b37&redirect_to=https://forms.domain.com:443/capture-card-status/

Let me know if you;d like additional information.

https://www.ads-software.com/plugins/user-switching/