Applicaton cannot connect to Plex Server

Hi!

Since 3.5.3, the iOS and iPadOS applications cannot connect to a local Plex Media Server thought the Connect to server > Plex menu.

The app shows a popup "Connect to server failed" "please check server address and credentials" (Translated from french). The server's logs show the following entries :

Apr 27, 2024 15:48:29.162 [281473622020320] DEBUG - Request: [x.x.x.x:52198 (Subnet)] GET /library/sections (4 live) # 263 GZIP Signed-in

Apr 27, 2024 15:48:29.163 [281473622020320] DEBUG - Completed: [x.x.x.x:52198] 401 GET /library/sections (4 live) # 263 GZIP 0ms 357 bytes

Steps to reproduce

1. Open App on iPhone or iPad

2. Select "Network" tab

3. Next to File servers, tap Connect

4. Select the Plex button

5. Enter Server name, Port, User and Password or select a previously saved item

6. Tap Connect

   

7. After a short time, the error message mentionned above shows

   

Additionnal informations :

• Problem occured after updating to 3.5.3 on a device. Another device that was, at that time, not updated to 3.5.3 was not experiencing the issue.
• Deleting the saved connection and creating it from stratch doesn't solve the problem
• Updating devices to 3.5.7 and Server to PlexMediaServer-1.40.2.8395-c67dce28e did not solve the issue
• Accessing medias though UPnP is not affected.

Thanks!