Error: Call to a member function id() on null i

@sarwan_verma, @sahana _N thank you, there is one more place in the code to edit, it is at line 85 near the "(int) $user->id()":

if ((int) $user->id() !== (int) $node->getOwnerId() && !$node->isPublished()) {
      return FALSE;
    }

I'd also checked a few lines starting from the line 56:

    if (empty($uid)) {
      $uid = \Drupal::currentUser()->id();
    }
    $user = User::load($uid);

How about this (from https://api.drupal.org/api/drupal/core%21lib%21Drupal.php/function/Drupa...):

$user = \Drupal\user\Entity\User::load(\Drupal::currentUser()
  ->id());

Also we may want to handle anonymous users, e.g.

if ($uid === 0)
// or
if(isset($user))

@marcoliver Thank you, have tried the patch with the latest Drupal 10.1.6 upgrade. Almost there, there is a block of code where empty $user throws an error, please see below:

• Error: Call to a member function getRoles() on null in Drupal\permissions_by_term\Service\AccessCheck->isAccessAllowedByDatabase() (line 165 of /permissions_by_term/src/Service/AccessCheck.php).
• Error: Call to a member function id() on null in Drupal\permissions_by_term\Service\AccessCheck->isAccessAllowedByDatabase() (line 175 of /permissions_by_term/src/Service/AccessCheck.php).

After wrapping foreach ($user->getRoles() as $sUserRole) { to if(!empty($user)) { the issue is gone. Well, mostly: there is a lot of The 'entity:user' context is required and not present. but I suppose it comes from somewhere else.
Thank you for all your help.

@marcoliver
Thank you, it looks working with the most recent Version: 3.1.30