After merge I cannot find posts and threads

[spacecadet]

One admina wanted to change her password and whne I went there to her profile this is the message I get there.
Warning [2] A non-numeric value encountered - Line: 1013 - File: admin/modules/user/users.php PHP 7.1.28-1+0~20190412071042.17+jessie~1.gbpbe9b36 (Linux)
File Line Function
/admin/modules/user/users.php 1013 errorHandler->error
/admin/index.php 597 require
Warning [2] A non-numeric value encountered - Line: 1014 - File: admin/modules/user/users.php PHP 7.1.28-1+0~20190412071042.17+jessie~1.gbpbe9b36 (Linux)
File Line Function
/admin/modules/user/users.php 1014 errorHandler->error
/admin/index.php 597

---

And there are these on some of the posts
Please see attached images as they format properly when I paste here and you won't know what is happening.