• A class in an app extends the class \IPS\memberlist\Helpers\Form\FormAbstract for which no file /home/dknelson/public_html/forum/applications/memberlist/sources/Helpers/Form/FormAbstract/FormAbstract.php exists! The method scanner skipped comparing that file to any of its subclasses
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• The class \IPS\memberlist\Helpers\Form\Address extends \IPS\memberlist\Helpers\Form\FormAbstract, but the parent class couldn't be loaded.

It looks like it is being caused by a third party app. What apps do you have installed and what the latest change/edit done to the forum prior to this error happening?

I disabled all apps and plugins.  Still getting the error.  

The only thing I. can remember changing is under Advanced Settings and Tasks.  I was. getting. a notification that my PHP was 7.4. and I needed to update, which I had already done.  But. I. hadn't changed the. cron command.  I. updated it to 

When this setting is enabled you MUST ensure that the cron is set up properly. If this setting is turned on but no cron is set up it will cause significant damage to your site.

You should set the cron to run the following command every minute:
/opt/cpanel/ea-php80/root/usr/bin/php -d memory_limit=-1 -d max_execution_time=0 /home/dknelson/public_html/forum/applications/core/interface/task/task.php 88fde358f746629c7470545dbe22bd4f

So I no longer the the warning about PHP 7.4 but I started. getting this new error.  I get the error every minute and I think this is the only task I have that runs every minute.  I don't remember what the command was before I made the change.  Permissions for task.php are set at 0777 as instructed.

Edited October 5, 20222 yr by Dknelson

Please try this.

Set that task.php file to 0755 permissions, rather than 0777, then test again.

Does the error go away? Or change to a different error?

5 hours ago, Mark H said:

Please try this.

Set that task.php file to 0755 permissions, rather than 0777, then test again.

Does the error go away? Or change to a different error?

OK....did that and I get the same error.

Is there anybody who can help me with this issue?  I am willing to pay.

You might want to ask the third party author if there's an issue with their code, this suggests they may be.