Blocksy Companion Issue?

I’m running a WordPress website using the Blocksy theme.

I’m experiencing very slow response times and performance on the website. I consider that I’m using very straightforward pages (no posts), and not too many plugins. A number of my pages are rather long, but they use straightforward text, and some example code blocks, using the Highlighting Code Block plugin. My hosting provider has been trying to help me resolve the issue.

My website recently sent me the following email. I sent it to my hosting provider, who commented:

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The blocksy which may be causing issues is also an editor / post management for the Gutenberg editor. This may be the root cause of all the issues.

That error is showing an issue with the plugin. If you do not rely on it for anything other than editing you may be okay to disable this
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Can you help figure out what might be the problem? And how to fix it? Thanks!

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Howdy!

WordPress has 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, Blocksy Companion.

First, visit your website (https://bhiggs.x10hosting.com/PracticalCPlusPlusProgramming/) and check for any visible issues. Next, visit the page where the error was caught (https://bhiggs.x10hosting.com/PracticalCPlusPlusProgramming/PracticalCPlusPlusProgramming/wp-admin/edit.php?post_type=page) 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.

https://bhiggs.x10hosting.com/PracticalCPlusPlusProgramming/wp-login.php?action=enter_recovery_mode&rm_token=EvNc6wbyYbi0VtzgirjEst&rm_key=9GcdSpF4QECLkik56M2eZC

To keep your site safe, this link will expire in 1 day. Don’t worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.7.1
Active theme: Blocksy (version 2.0.85)
Current plugin: Blocksy Companion (version 2.0.85)
PHP version 7.4.33

Error Details
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An error of type E_COMPILE_ERROR was caused in line 135 of the file /home/bhiggs/public_html/PracticalCPlusPlusProgramming/wp-content/plugins/blocksy-companion/framework/autoload.php. Error message: require(): Failed opening required ‘/home/bhiggs/public_html/PracticalCPlusPlusProgramming/wp-content/plugins/blocksy-companion//framework/features/blocks/breadcrumbs/block.php’ (include_path=’.:/opt/alt/php74/usr/share/pear’)

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