Edit: ignore all this and check you have the latest version.
None of these custom integrations have had their manifest file updated to include version information. So they have stopped working with the 2021.6 HA update. See https://github.com/home-assistant/core/pull/49916
The developers of these custom integrations have had since the 29th of January to add this information.
You should raise an issue with each of the custom integration developers.
You can of course add this information yourself to get the integrations working, but as they seem to be poorly maintained you might want to start looking for alternative solutions.
Anyway, lets use the pelx_recently_added integration as an example:
Go to config/custom_components/plex_recently_added
and open the file manifest.json with a text editor.
Inside you will see this:
{
"domain": "plex_recently_added",
"name": "Plex Recently Added",
"version": "0.3.7",
"documentation": "https://github.com/custom-components/sensor.plex_recently_added",
"dependencies": [],
"codeowners": ["@maykar"],
"requirements": []
}
Add a comma after the requirements
value and add a version key and value below it, like this:
{
"domain": "plex_recently_added",
"name": "Plex Recently Added",
"version": "0.3.7",
"documentation": "https://github.com/custom-components/sensor.plex_recently_added",
"dependencies": [],
"codeowners": ["@maykar"],
"requirements": [],
"version: "1.2.3"
}
The version can be any "x.y.z"
value composed of numbers. Save the file. Do the same for the other custom integrations you listed then restart home assistant.