emailing pdf causes critical error on website

This happens more often than not. I email a pdf which is supposed to result in a post being made, but instead I get this message:

Since WordPress 5.2 there is a built-in feature that detects when a
plugin or theme causes a fatal error on your site, and notifies you
with this automated email.

In this case, WordPress caught an error with one of your plugins, Postie.

First, visit your website (https://pachurch.ca/) and check for any
visible issues. Next, visit the page where the error was caught
(https://pachurch.ca/wp-admin/admin.php?page=postie-settings) and
check for any visible issues.

Please contact your host for assistance with investigating this issue further.

If your site appears broken and you can't access your dashboard
normally, WordPress now has a special "recovery mode". This lets you
safely login to your dashboard and investigate further.

When seeking help with this issue, you may be asked for some of the
following information:
WordPress version 6.0.1
Active theme: Pro (version 5.1.5)
Current plugin: Postie (version 1.9.61)
PHP version 7.4.30

Error Details
=============
An error of type E_ERROR was caused in line 224 of the file
wp-content/plugins/postie/lib/fMailbox.php.
Error message: Allowed memory size of 134217728 bytes exhausted (tried
to allocate 4194320 bytes)

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