wfasa on "[Plugin: Wordfence Security] Fatal error: Allowed memory size"

When I run Wordfence, I get the following error:

[May 13 11:01:21] Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 8797390 bytes) in /home/justworl/www.justworldinteational.org/docs/wp-includes/wp-db.php on line 1225

So I ran the Wordfence Memory benchmarking utility, with the following results:

--Starting test--
Current maximum memory configured in php.ini: 128M
Current memory usage: 48.00M
Setting max memory to 90M.
Starting memory benchmark. Seeing an error after this line is not unusual. Read the error carefully
to determine how much memory your host allows. We have requested 90 megabytes.
Completing test after benchmarking up to 80.25 megabytes.
--Test complete.--

Congratulations, your web host allows you to use at least 80.25 megabytes of memory for each PHP process hosting your WordPress site.

What would cause this memory problem - a plugin?

And shouldn’t 128M be enough memory for Wordfence?

I thought deleting the WP Super Cache plugin and all its files might help, so I did that and re-ran Wordfence. Result:

[May 13 11:04:33] Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 8746938 bytes) in /home/justworl/www.justworldinteational.org/docs/wp-includes/wp-db.php on line 1225

So, I deactivated ALL the site’s plugins (15 total) except Wordfence and re-ran Wordfence. Similar error:

[May 13 11:25:42] Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 17493917 bytes) in /home/justworl/www.justworldinteational.org/docs/wp-includes/wp-db.php on line 1227

What should I try next? I'm out of ideas.

https://wordpress.org/plugins/wordfence/