Update 3.2.87 causes fatal error

Hi,
I use Download Manger Free in site, were logged in users can download files. For login I use standard WP login.
After update 3.2.87 after I logout (I have admin position) I got fatal error.
And then I got “There has been a critical error on this website” all the time.

In server logs I got this message:
Got error ‘PHP message: PHP Fatal error: Uncaught TypeError: get_class(): Argument #1 ($object) must be of type object, null given in /home/……../wp-content/wtyczki/download-manager/src/User/Login.php:359
As you see I use custom name for plugins catalogue, but it’s not the problem.
After deactivating plugin, the site gets back to life.

Is there any chance to cope with this bug?
Thanks in advance.

Marcin

Hello.
Yes indeed, I made yesterday, complete test of the structure and plugins and it seems that error is caused in conjunction with WP Cerber Security which is also crucial for this site as Download Manger. I think the most important part is that:
WPDM\\User\\Login->verifyLoginEmail(NULL, ‘Test user’, ‘Test pass’)

As I said earlier, the previous version 3.2.86 – worked without any problem.

I hope that it’s going to be cured, since the site is offline now. WP Cerber and Download Manager made it workink as a charm.

Thanks in advance for the help.

Thanks a lot, will be waiting.

Thank you very much, it’s working!
Great support.