itthinx

This plugin redirects 404’s caused by hits on pages that are protected by <a href="https://wordpress.org/plugins/groups/" rel="ugc">Groups</a>.
The redirection settings can be adjusted in Settings > Groups 404 :
Visits to protected pages can be redirected to:
<ul>
<li>a specific post, or</li>
<li>the WordPress login</li>
</ul>
The redirection can also be applied for restricted categories, tags and other taxonomy terms if <a href="https://www.itthinx.com/shop/groups-restrict-categories/" rel="nofollow ugc">Groups Restrict Categories</a> is used.
The redirect status code can be selected among:
<ul>
<li>Moved Permanently (301)</li>
<li>Found (302)</li>
<li>See other (303)</li>
<li>Temporary Redirect (307)</li>
</ul>

Groups 404 Redirect

I know this plugin hasn't been updated in a couple years, but IMHO Groups and its related plugins (like this one) are a hidden gem for WordPress sites. So many people jump to complicated membership plugins when they could do everything they need with Groups. This 404 redirect add-on works like a charm. I'm using it on the latest version of WP 5.x

Perfect.

Redirect 404's when a visitor tries to access a page protected by Groups.

Franky

To try it out on your free dummy site, <a href="https://tastewp.org/plugins/events-made-easy/" rel="nofollow ugc">Click here</a> (courtesy of TasteWP)
Events Made Easy is a full-featured event and membership management solution for WordPress and ClassicPress. Events Made Easy supports public, private, draft and recurring events, membership and locations management, RSVP (+ optional approval), several payment gateways (Paypal, FirstData, Mollie and others) and OpenStreetMap integration. With Events Made Easy you can plan and publish your event, let people book spaces for your weekly meetings or manage volunteers and memberships. You can add events list, calendars and description to your blog using multiple sidebar widgets or shortcodes; if you are a web designer you can simply employ the placeholders provided by Events Made Easy.
Main features: 
* Public, private, draft and recurring events with custom and dynamic fields in the RSVP form 
* Allow people to create events from the frontend using a specific shortcode 
* Membership management with custom and dynamic fields 
* Volunteer management for events (using event tasks) 
* Attendance reporting for events and memberships if the rsvp or member qrcode is scanned by someone with enough rights 
* Page and post content protection through memberships or via shortcodes 
* Drip content via memberships 
* People and groups with custom fields per person 
* PDF creation for membership, bookings and people info 
* Membership card or booking ticket can be sent as PDF via mail automatically, with optional QR code to scan for attendance/payment info 
* RSS and ICAL feeds 
* Calendar management, with holidays integration 
* Several widgets for event listings and calendar 
* Location management, with optional OpenStreetMap integration 
* RSVP bookings with custom fields and dynamic fields, payment tracking, optional approval, discounts 
* Protection of forms with internal captcha, Google reCaptcha or hCaptcha 
* Templating for emails, event lists, single events, feeds, RSVP forms, … with specific placeholders for each 
* Lots of shortcodes and options 
* Payment gateways: Paypal, FirstData, Mollie, Payconiq, Worldpay, Stripe, Braintree, Instamojo, Mercado Pago, Fondy, SumUp, Opayo 
* Send emails to registered people, automatically send reminders for payments 
* Automatically send reminders for memberships that are about to expire or have expired 
* Mail queueing and newsletter functionality 
* Mailings can be planned in the future, cancelled … and can include extra attacments 
* Multi-site compatible 
* Several GDPR assistance features (request, view and edit personal info via link; delete old records for mailings, attendances, bookings) 
* Fully localisable and already fully localised in German, Swedish, French and Dutch. Also fully compatible with polylang and <a href="https://github.com/qtranslate/qtranslate-xt/" rel="nofollow ugc">qtranslate-xt</a>: most of the settings allow for language tags so you can show your events in different languages to different people. The booking emails also take the choosen language into account. For other multi-lingual plugins, EME provides its own in-text language tags and takes the current chosen language into account.
For documentation on all shortcodes and placeholders, visit the <a href="https://www.e-dynamics.be/wordpress/eme-docs/" rel="nofollow ugc">Official site</a> .

Events Made Easy

Manage and display (recurring) events, memberships, locations and maps, volunteers, widgets, RSVP, ICAL and RSS feeds, payment gateways. SEO ready.

Groups 404 Redirect vs Events Made Easy