New Install - New user registration error 8192: preg_replace_callback(): Passing

[Alienwaiting]

Hi,
I installed the message board, 2.0.19 and I have user registration set a email confirmation and mail setup to PHP default. The full error I get when someone registers as a user:
8192: preg_replace_callback(): Passing null to parameter #3 ($subject) of type array|string is deprecated
Sources/Load.php - Line: 178
which is:

$string = preg_replace_callback('~(&' . (!empty($double) ? '(?:amp;)?' : '') . '#(\d{1,7}|x[0-9a-fA-F]{1,6})~', 'entity_fix__callback', $string);

where is the problem here? any advice is appreciated.
Thank you!

[Arantor]

What version of PHP are you using?

[Alienwaiting]

Hi Arantor-

PHP Version    8.0.14

[Alienwaiting]

Update : Today there is no error messages in the log when I try to send a reactivation link, or when a new user registers, but there is no email reaching destination - I tested the host using the testemail.php script from this link link and I got the test message to the destination. But clicking from index.php?action=activate page doesn't get any email. There was nothing changed in the setup.

[Kindred]

I recall someone else reporting an issue with PHP 8.0 and the mail process.  Not sure if there was any resolution yet.

[Alienwaiting]

I don't think it was resolved. Thanks for the feedback. I changed the PHP to 7.4 from 8.0 and the emails came through.

[awks]

For over 10 years my mail has been good, however lately it appears that when a new user signs up, the admin (me) gets the email but the email that normally gets sent to the new user who just signed up never appears.

I also have just downgraded the php version from 8.0 to 7.4 and now the new user gets the email!

This has cost me almost 2 weeks until I came across this post.

Thanks to Alienwaiting and Kindred for posting this,