Issues with 2.0.10 and WP 5.5

Hi, I’m testing WP 5.5 and the latest plugin updates, and I am bumping into some issues with this plugin.

I can’t log into WP Admin, and I experience logins being redireced to the homepage like other people said.

I SSHed in and used redis-cli FLUSHALL, and even rebooted the server, but nothing. Renaming the plugin to deactivate it removed the issue.

Looking at the PHP error logs, I can see this:
PHP Warning: PHP Startup: Unable to load dynamic library ‘redis.so’ (tried: /usr/lib/php/20180731/redis.so (/usr/lib/php/20180731/redis.so: undefined symbol: igbinary_serialize), /usr/lib/php/20180731/redis.so.so (/usr/lib/php/20180731/redis.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0

That’s the only recent message about Redis.

Thanks!

The page I need help with: [log in to see the link]