Same issue, I looked at the “Plex Media Server.log” file
It’s full of entries like this:
Oct 16, 2021 09:27:37.952 [0x154475c8cb38] WARN - Caught exception trying to convert extra data attribute 'originallyAvailableAt' with type 1 and value '2015-04-20' ~ bad lexical cast: source type value could not be interpreted as target
Oct 16, 2021 09:27:40.138 [0x154475c8cb38] WARN - Caught exception trying to convert extra data attribute 'originallyAvailableAt' with type 1 and value '2015-04-20' ~ bad lexical cast: source type value could not be interpreted as target
Oct 16, 2021 09:27:44.260 [0x154475a16b38] WARN - [Transcode] Got a request to stop a transcode session without a valid session GUID.
Oct 16, 2021 09:27:45.590 [0x15446d775b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:27:55.644 [0x15446d775b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:28:05.692 [0x15446d775b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:28:05.698 [0x15446d775b38] WARN - Caught exception trying to convert extra data attribute 'originallyAvailableAt' with type 1 and value '2012-10-05' ~ bad lexical cast: source type value could not be interpreted as target
Oct 16, 2021 09:28:12.529 [0x15446d775b38] WARN - [Transcode] Got a request to stop a transcode session without a valid session GUID.
Oct 16, 2021 09:28:12.650 [0x15446d775b38] WARN - QueryParser: Invalid field 'libraryHubsOnly' found, ignoring.
Oct 16, 2021 09:28:12.740 [0x154475a19b38] WARN - QueryParser: Invalid field 'libraryHubsOnly' found, ignoring.
Oct 16, 2021 09:28:16.642 [0x154475a19b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:28:27.448 [0x154475a19b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:28:37.493 [0x15446d775b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:28:42.429 [0x154475a19b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:28:42.491 [0x154475a19b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:28:42.550 [0x154475a19b38] WARN - QueryParser: Invalid field 'IncludeExternalMedia' found, ignoring.
Oct 16, 2021 09:28:42.583 [0x154475a19b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:28:42.937 [0x15446d775b38] INFO - AutoUpdate: no updates available
Oct 16, 2021 09:28:43.392 [0x154475a19b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:28:43.458 [0x15446d775b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:28:43.486 [0x15447656fb38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:28:43.522 [0x154475a19b38] WARN - QueryParser: Invalid field 'IncludeExternalMedia' found, ignoring.
Oct 16, 2021 09:28:43.657 [0x15446d775b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:28:47.545 [0x15446d775b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:28:57.594 [0x15446dfa1b38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:29:01.403 [0x15446dfa1b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:29:01.557 [0x15447656fb38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:29:01.715 [0x154475a19b38] ERROR - Unknown metadata type: folder
Oct 16, 2021 09:29:04.285 [0x154475a19b38] WARN - QueryParser: Invalid field 'libraryHubsOnly' found, ignoring.
Oct 16, 2021 09:29:06.551 [0x15447656fb38] WARN - QueryParser: Invalid field 'libraryHubsOnly' found, ignoring.
Oct 16, 2021 09:29:06.697 [0x15446dfa1b38] WARN - QueryParser: Invalid field 'libraryHubsOnly' found, ignoring.
Oct 16, 2021 09:29:06.812 [0x15447656fb38] ERROR - Error resizing an image, we don't trust what we cached [/config/Plex Media Server/Cache/PhotoTranscoder/55/55f6a537ce26524662b9b114f40030e60b1439f4.jpg]
Oct 16, 2021 09:29:06.826 [0x15446d775b38] ERROR - Error resizing an image, we don't trust what we cached [/config/Plex Media Server/Cache/PhotoTranscoder/d5/d598beb4cc5ba699dd7937290ff94ae1a496f77b.jpg]
Oct 16, 2021 09:29:07.642 [0x15447656fb38] ERROR - Unable to find client profile for device; platform=webOS, platformVersion=6.2.0, device=webOS 6.2.0, model=55UP7560AUD
Oct 16, 2021 09:29:07.648
I should note, that I don’t have a LG TV or webOS device.