The latest version of the module ^2.0@alpha is not compatible with latest Drupal version i.e. Drupal 9.3.9.
I have been working upon the up gradation of the site from Drupal 8.8.x to latest Drupal version i.e. 9.3.9. The entire process of Drupal core upgraded completed well, also upgraded the "Views Tree" module to the latest alpha version module. Now when investigating the site have found that the fields which were using "TreeHelper (Adjacency model)" as Entity Reference are throwing error as mentioned below because of which not able to access the "Managed field" section of that particular field.
Active
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Changes in the Merge Request 9 looks good and fixed the rrror for me
+1 for this to be merged.
Going to include in the D11 release to address the phpstan from gitlab.